389 Directory Server
389 Directory Server (formerly Fedora Directory Server) is a full-featured LDAPv3 compliant server. In addition to the standard LDAPv3 operations, it supports multi-master replication, fully online configuration... and administration, chaining, virtual attributes, access control directives in the data, Virtual List View, server-side sorting, SASL, TLS/SSL, and many other features. Read more hot
FreeRADIUS is a modular, high performance free RADIUS suite. This software allows authentication and authorization for a network to be centralized, and minimizes the number of changes that have to be done when adding or deleting new users to a network. Read more hot
Samba is an Open Source/Free Software suite that has, since 1992, provided file and print services to all manner of SMB/CIFS clients, including the numerous versions of Microsoft Windows operating systems. Samba is freely available under the GNU General Public License. Read more hot
VNC is a remote display system which allows you to view a computing 'desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. Read more hot
a freely redistributable open-source implementation of the X Window System. XFree86 runs primarily on UNIX® and UNIX-like operating systems such as Linux, all of the BSD variants, Sun Solaris x86, Mac OS X (via Darwin), as well as other platforms like OS/2 and Cygwin. XFree86, provides a client/server interface between display hardware (the mouse, keyboard, and video displays) and the desktop environment while also providing both the windowing infrastructure and a standardized application interface (API). XFree86 is platform-independent, network-transparent and extensible hot
(commercial) offering OpenGL hardware acceleration for a range of 3D Graphics chips. Several product variations are available. The least expensive Gamer Edition is intended for applications needing single window use of hardware accelerated OpenGL. The Professional Edition offers support for more complex display options on high end graphics boards, such as animated shaped X Windows overlapping multiple moving 3D windows
(commercial) includes 2D and 3D support for over
30 cards and laptops and is comprised of four Series-Desktop, Laptop, Multi-head, and Workstation. New and
enhanced features include: 3D stereo (on most cards), Color Magic, Graphical Setup, Video Window, and Power Throttle
The Amahi Home Server is a "Home Digital Assistant," or HDA. It's a server targeted for home and home office environments. It provides calendaring, a wiki, shared network storage, network backups, a printer server, remote access, and more.
Antinat is a flexible SOCKS server and client library for writing proxy-based applications. It supports SOCKS 4, SOCKS 4a, SOCKS 5, authentication, CHAP, XML firewalling, Win32, server chaining, and UDP. It also contains very experimental IPv6 support.
Aradial radius server
(commercial) Developers of radius server software solution for ISP/WISP/VOIP/Hotspots(WLAN). Aradial radius server has integration with 3'rd party isp billing and prepaid solutions.
Runs: Windows, Linux, Solaris and other UNIX.
Archiveopteryx is an Internet mail server, optimized to support heavy usage and long-term archiving. It stores mail in a PostgreSQL database, and provides access to it through IMAP, POP, and more.
Atlantis Talker is a telnet-based chat server with features like message boards, a mail system, games, and rooms, all in plain ASCII.
AXIGEN Mail Server
(commercial) AXIGEN is a fast, reliable and secure mail server on Linux, with an open architecture, designed for easy management allows full control of the email traffic from central WEB /CLI Admin module.
Providing ESMTP, IMAP, POP3 services, AXIGEN is tested for the standard mail clients and special Webmail module enables email access and delivery from internet browsers.
the design of the "Simple Blinkenlights Transfer Protocol" and the implementation of a server that can handle all of its features
BNC is a simple program designed to Proxy irc sessions.
an attempt at writing a Battle.net compatible server
Brunhilde is a robust mp3 server with a simple and elegant design.
Business Oriented Framework
Business Oriented Framework (BOF) is a Perl application server. It uses SOAP, optionally secured with SSL, to communicate with the client. The client can use SOAP::Lite or the client module included in BOF, making it easy to connect to the server.
cd-server is an application that allows the ability to run a website completely off a CD/DVD-ROM disc. The cd-server is powered by several other open source projects, Apache, Perl, mod_perl, PHP, and MySQL.
a pair of programs which are used to maintain the accuracy of the system clock on a computer. The two programs are called chronyd and chronyc. Chronyd is a background (daemon) program, which can be started at boot time. Chronyc provides a user interface to chronyd for monitoring its performance and configuring various settings
Cistron RADIUS server
mostly compatable with Livingston's 'radiusd-2.01', except without the s/key or menu support. It has additional features such as multiple DEFAULT entries with fall-through, limiting connections on a per-user basis or per-hunt group basis, and much more
Collax Business Server
Collax Business Server is an all-in-one Linux server for small- and medium-sized businesses.
Internet Messaging Server for Linux and other platforms. Optimized in design to provide access to hundreds of thousand accounts and relay mail on the most heavily loaded sites.
Courier-IMAP is a server that provides IMAP access to Maildir mailboxes. This IMAP server does NOT handle traditional mailbox files (/var/spool/mail, and derivatives),
it was written for the specific purpose of providing IMAP access to Maildirs.
an openPGP (RFC2440) compliant public key server. It is currently under development. It is written in C, and runs on Linux
a secure bridge for cvs pservers
deepstream is a new type of server that syncs data and sends events across millions of clients.
DeleGate is a multi-purpose application level gateway, or a proxy server which runs on multiple platforms (Unix, Windows, MacOS X and OS/2). DeleGate mediates communication of various protocols (HTTP, FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, SOCKS, DNS, etc.), applying cache and conversion for mediated data, controlling access from clients and routing toward servers. It translates protocols between clients and servers, applying SSL(TLS) to arbitrary protocols, merging several servers into a single server view with aliasing and filtering. Born as a tiny proxy for Gopher in March 1994, it has steadily grown into a general purpose proxy server. Besides beeing a proxy, DeleGate can be used as a simple origin server for some protocols (HTTP, FTP and NNTP).
Dents is a server for the DNS protocol as specified in RFC 1035 et al.; it is licensed under the terms of the GNU GPLv2.
an easy-to-use and affordable communication server that can handle all the communication and collaboration needs of your company. Now you can install a highly productive environment in minutes, using a single integrated product that enables you and your coworkers to collaborate and share knowledge
Dev9 is a Linux /dev manager. The idea is to write a 9p2000.u server that ends up providing the same functionality as a combined devfs and udev.
a replacement for INND: a backbone news transit system
a server which supports the DICT protocol
DictD++ is a fast, feature-rich, and portable dictionary server that implements the DICT protocol. It supports Unicode plus all encodings present in ICU, different matching strategies, dictd-compatible dictionaries and indices, and definitions transformations prior to sending them to the client.
Diladele Web Safety
Diladele Web Safety is an ICAP server that integrates with an existing Squid proxy server and provides rich content and Web filtering functionality to sanitize Internet traffic passing into an internal home/enterprise network.
DinX, an experimental windowing system. DinX is designed to be simple, lightweight, and fast. It should be suitable for running multiple windowed programs on a small system, like a Linux handheld. DinX uses the Linux kernel's framebuffer video driver. It adds two new interfaces, /dev/dinxsvr and /dev/dinxwin. A server program connects to /dev/dinxsvr and arbitrates requests from windows to occupy various parts of the display.
(commercial) an advanced email server package. It provides a complete internet mail solution for sending and receiving email across your organization, and over the internet
a caching name server for use on dial-up gateway machines designed to behave nicely when the gateway is not connected
Dropbear SSH Server
implements most required features of the SSH 2 protocol, and other features such as X11 and Authentication Agent forwarding. Dropbear is Open Source software, distributed under a MIT-style license
the server component of the Embedded Linux MP3 Player, TNG
a multi-input/output service server: Users can request / receive results with http, ftp or email connection;
This server is a full multi-thread JAVA server using database (mysql support), POP3, SMTP protocols
EtherMux Server is a client-server implementation of a DMX512 lighting remote. Desgined for use on PocketPC based devices (eg iPAQ) it can easyly be ported to other platforms. The server end runs on a Linux PC with DMX4Linux and a DMX interface card.
EZblue Business Server
(commercial) EZblue Business Server is a complete software package consisting of the EZblue Linux OS, a Debian-based Linux.
ezbounce is a highly configurable IRC proxy that has password protection, numerous tweakable settings, remote administration and access control (ban lists and allow lists).
ftp4all is a FTP server program for UNIX systems. Unlike existing FTP servers, e.g. WUFTPD, FTP4ALL does not require an root account to install it.
Gearmand is the job server component of Gearman. Gearman provides a generic framework to farm out work to other machines, dispatching function calls to machines that are better suited to do work, to do work in parallel, to balance the load of processing, or to call functions between languages.
a simple http server emulation daemon that allows users to watch their accounting statistic and admins to watch general users statistic,
terminal lines and other system wide statistic for any period of time
a small, fast, and efficient POP3 server. It was written to provide the best RFC compliance and performance possible
GoFish Gopher Server
a very simple gopher server. It is designed with security and low resource usage in mind, and uses a single process that handles all the connections
GPM (General Purpose Mouse) is a mouse server for the console and xterm, with sample clients included (emacs, etc).
Grapherl is a real-time scalable monitoring server.
a graphical user interface program communication with a client application (using XML protocols). The application send widget building requests to Guis (so these requests are input for Guis) and handles widget events sent from Guis
IC-RADIUS is a variant of Cistron RADIUS, but with a MySQL backend.
It includes a web interface for user management, as well as a CGI for your users to check their usage.
ident2 is an auth/identity server with wide UNIX support. Distributed under the GPL.
IDS POP is a small, fast, and efficient POP3 server.
IIPimage enables the remote viewing of very high resolution images. It consists of a client-server architecture that is designed to be usable even over a slow dialup connection.
InterXim is a X11 XIM server that use the Yudit kmaps files to translate ASCII character sequences to Unicode.
an Instant Messaging System, similar to ICQ or AIM, but yet far different. It is open-source, absolutely free, simple, fast, extensible, modularized abdcross platform
JamNNTPd is a NNTP server that can serve messages stored in a Fidonet JAM messagebase. By doing this, it allows local and remote users to access JAM messagebases. Posting is also supported.
JCast-X is a media streaming server solution build on top of an extremly flexible component architecture.
Jenkins is an automation engine with an unparalleled plugin ecosystem to support all of your favorite tools in your delivery pipelines, whether your goal is continuous integration, automated testing, or continuous delivery.
a multi-purpose server written in C. It is highly extensible, well written, equipped with a great set of libraries including scripting, persistent database, object memory management
kpf is a public fileserver for KDE. It is implemented as a basic web server - compatible with wget, links, Konqueror , Netscape Navigator, etc. It also features bandwidth capping, a real-time point-and click interface, persistent connections.
Kernel TCP Virtual Server: implements application-level load balancing inside the Linux kernel, so called Layer-7 switching
a USENET software package designed for small sites running any flavour of Unix, with a few tens of readers and only a slow link to the net
Linbox Directory Server
LDS (Linbox Directory Server), along with the Linbox Management Console (LMC), is a system that allows developers, system administrators, and other software vendors to manage users, groups, and their associated policies in an LDAP server. Its highly ergonomic interface design makes it very easy to use, and delegation of administration enables medium size organization to adopt LDS.
Linux RADIUS Server
(commercial) High Performance RADIUS Server for Carriers, ISPs and Enterprises.
Linux-VServer provides virtualization for GNU/Linux systems. This is accomplished by kernel level isolation. It allows to run multiple virtual units at once. Those units are sufficiently isolated to guarantee the required security, but utilize available resources efficiently, as they run on the same kernel.
LIXA (LIbre XA) is a transaction manager implementing the distributed transaction processing "XA specification" and "TX (transaction demarcation) specification" according to the X/Open CAE Specification.
LysCVS is a system that provides access to CVS in an easily administered way for both local and external users.
(commercial) MagicMail Server is a Linux-based software solution providing administrators the power to maintain a secure and stabilized system, while supporting the latest technological advances.
Microbrew Message Center
being developed to be an open-source GPL'd multi-domain mail server system akin to iPlanet Messaging Server and post.office. The design allows for an indefinite number of domains and users to be added to the system just by adding one machine as necessary
Mir is a display server technology being developed by Canonical. It is a system-level component targeted as a replacement for the X window server system to unlock next-generation user experiences for devices ranging from Linux desktop to mobile devices powered by Ubuntu.
a project to deploy remote X desktops to thin clients and mobile users. We aim to coagulate Internet forces around it and build a real OpenSource alternative to Citrix WinFrame and SCO Tarantella
MOCKS is a small, easy configurable, RFC1928 compliant SOCKS 5 server. MOCKS supports upstream proxy and IP-based client filtering rules.
Nano-X is a tiny X server replacement for small systems such as palmtops, and PDAs.
a high-performance File Transfer Protocol (FTP) server for UNIX systems, designed especially for high-traffic sites and internet service providers
NexusChat is a single-threaded telnet chat server written in C. NexusChat, also known as nchat, has a long history. It first started out as a single line dial-up chat server for MS-DOS, which eventually lead to NexusChatLite which was faster and supported multiple lines.
NFS-GANESHA is a user-space NFSv2, NFSv3, and NFSv4 server. It runs on Linux, BSD variants, and POSIX-compliant Unixes.
Open Application Server
an Application Server that is written in C++, has a multithreaded Request Delivery Architecture, can load request handlers as packaged in external shared libraries, supports resource control and offers helper library for applications such as http protocol handler
OpenConnect VPN server
OpenConnect VPN server (or ocserv), is a server implementing the AnyConnect SSL VPN protocol and is compatible with the OpenConnect VPN client. Its purpose is to be a small, secure and configurable VPN server that depends on standard protocols like TLS 1.2, and Datagram TLS.
an OpenSource Direct Connect Server
OpenDJ is an open source Lightweight Directory Access Protocol (LDAPv3) and Directory Service Markup Language (DSMLv2) compliant directory service written in Java. Its easy installation process, combined with the power of the Java platform makes OpenDJ a simple, fast directory to deploy and manage. OpenDJ directory server comes with plenty of tools and a full-featured LDAP SDK for Java. OpenDJ directory server also offers REST access to directory data over HTTP. Read more
OpenLDAP is an open-source implementation of the LDAP protocol. It is a suite of the Lightweight Directory Access Protocol (v3) servers, clients, utilities, and development tools. Read more
OpenLink Virtuoso is a server product that implements multiple industry standard protocols as part of a single cross platform product offering. Its broad protocol support enables it to offer Web, file, and database server functionality alongside native XML storage, universal data access middleware, and a Web services platform as part of a cohesive single server solution. Read more
an open source Napster server
OpenRADIUS is a RADIUS server that links your network access devices to your user-, service profile-, and usage databases. OpenRADIUS has a powerful external module interface that uses pre-spawned subprocesses and pipes for communication, allowing you to implement modules in any language that supports Unix pipe I/O. Its behaviour is fully configurable, using a simple built-in language that gives you full control over the request and reply list. Read more
OpenSIPS is a multi-functional, multi-purpose signaling SIP server - it can act as SIP Router/Switch, SIP Registrar, Application Server, Redirect Server, Load Balancer / Dispatcher, Back-to-Back User Agent, Presence Server, IM Server, Session Border Controller, SIP Front-End, NAT traversal Server, IP Gateway (SMS, XMPP) and others.
Parse Server is an open source version of the Parse backend that can be deployed to any infrastructure that can run Node.js.
Peephole is a GNU/linux server that periodically checks users' mailboxes harvesting only last emails, extracting user-defined regular espressions. Each user, once logged in, has to define his mail providers [mail server and login informations] and other settings [time delay, regular expressions, ...].
Peephole supports various mail protocol as pop3, pop3s and apop.
Penrose is a virtual directory server. A Virtual Directory does not store any information itself, unlike other LDAP implementations. Requests received from LDAP client applications are processed by Penrose and passed on to the data source hosting the desired data. Penrose currently supports Active Directory, LDAP and JDBC back-end.
a DNS Server for both Win32 and POSIX platforms, such as Windows 95 and Linux
PowerDNS Nameserver is a modern, advanced and high performance authoritative-only nameserver. It is written from scratch and conforms to all relevant DNS standards documents.
Qpopper is a server that supports POP3 protocol for downloading Internet e-mail from software clients. Qpopper does not include a message transfer agent or SMTP support and normally works with standard UNIX mail transfer agents such as sendmail or smail.
a highly configurable and flexible Radius server that supports authentication by a huge range of authentication methods such as Flat files, DBM files, Unix password files, SQL databases, remote Radius servers (proxying), external programs, NT User Manager, Active Directory etc
Radius is a server for remote user authentication and accounting. Its primary use is for Internet Service Providers, though it may as well be used on any network that needs a centralized authentication and/or accounting service for its workstations. Read more
(commercial) RADIUS/AAA solutions for Wireless, Roaming, VOIP and VPN. Includes integrated web mgmt and reporting.
Raw Print Server
Raw Print Server is a "raw" print server that makes it possible for a computer to act as a "Socket API" or "AppSocket" print server.
rfc868server is a time/date server for rfc868 clients such as rdate. Normally, this service is provided by other packages such as xinetd.
rinetd redirects TCP connections from one IP address and port to another. rinetd is a single-process server which handles any number of connections to the address/port pairs specified in the file /etc/rinetd.conf.
Ripple is a lightweight Dart messaging server supporting STOMP messaging protocol.
Rxlogd is a receive-only syslog server (collector) that can coexist with sysklogd. It features simplicity, ease of use, and a built-in DNS cache for high performance. The intended audience is users of enterprise systems stuck with sysklogd, or administrators who don't need more complex syslog server solutions.
s-news is a simple news server for hosts with one or two users. It is intended to supply spool and offline news reading for a configured selection of newsgroups.
News about SAP R/3 and Linux (in German)
Software Against Unsolicited Commercial Email: an SMTP server that sits between the Internet and your actual mail software. It was originally written to help in the
fight against spam, but it also helps encourage good configuration and administration in general
an open-source server written in Perl which provides an architecture to simplify and streamline the process of writing applications that run on an instant messaging network
SIP Express Router
a high-performance, configurable, free SIP ( RFC3261 ) server . It can act as registrar, proxy or redirect server. It features an application-server interface, presence support, SMS gateway, SIMPLE2Jabber gateway, RADIUS/syslog accounting and authorization, server status monitoring, FCP security, etc. Web-based user provisioning, serweb, available
Slanger is a standalone server ruby implementation of the Pusher protocol. It is not designed to run inside a Rails or sinatra app, but it can be easily installed as a gem.
Small Footprint CIM Broker
The Small Footprint CIM Broker is a CIM server (or CIMOM) like OpenPegasus or OpenWBEM, but is targeted at resource-constrained environments. A CIMOM manages communication between providers, which interact with the hardware, and a CIM client, where the administrator manages the system. SFCB supports CMPI-style providers, such as those in the SBLIM project. The SBLIM project is a collection of tools designed to support Web-Based Enterprise Management (WBEM).
a proxy protocol for client/server environments. SOCKS includes two primary components, the SOCKS server and the SOCKS client library
Soulfind is a free Soulseek server program, compatible with most current Unix clients (at least PySlsk, Nicotine, and Museek).
Spurge RGTP server
Spurge RGTP server implements the Reverse Gossip Transfer Protocol bulletin board protocol. RGTP is notable for cryptographic authentication of posters, and item-based rather than thread-based discussion.
SSL-Explorer is a fully-featured, web-based SSL VPN server. Read more
Stream is a Dart Web server supporting URI mapping, template technology, file-based static resources, and an MVC design pattern.
Supervisor is a client/server system that allows its users to control a number of processes on UNIX-like operating systems.
Surealived is a effective LVS (Linux Virtual Server) service tester. It is based in epoll and allows you to detect your hosts' state using HTTP, TCP, DNS, and exec testers.
the Tacacs+ daemon from Cisco Systems is used in conjunction with Cisco routers for authorization, authentication, and accounting services
TallyMan is a GPL server-based content management and transaction management system.
(commercial) an application server for Linux
tcp_server is a simple, generic tcp based server for allowing access to multiple server processes. It's very simply configurable, and can serve up multiple processes.
teapop is another RFC1939 compliant POP3-server that also has flexible virtual domain support.
a small, hopefully scalable, single-threaded file server. It can serve multiple files over http and ftp simultaneously, listening on any number of ports and providing entirely different views of the filesystem to different users
a package to build a terminal server using a Unix server and 1 or more serial ports
TurboCluster Server is a high availability complete Linux OS clustering solution for Linux, is available for free download, FTP install, or FTP upgrade. The clustering system allows multiple Linux machines to function as a single web server, mail server or other TCP/IP server. Load-balancing among the nodes is configurable by the user.
an event-based framework for internet applications. It includes a web server, a telnet server, a multiplayer RPG engine, a generic client and server for remote object access, and APIs for creating new protocols
a user-space implementation of the NFSv3 server specification. It provides daemons for the MOUNT and NFS protocols, which are used by NFS clients for accessing files on the server
UW Imap Server
includes the IMAP4rev1 server, as well as a POP server that, in addition to offering the normal POP service,
can relay commands to an IMAP server, thus permitting existing POP clients to access an IMAP server
a frameserver for AXIS and other "webcams" that speaks the VNC protocol (also known as the Remote Framebuffer protocol)
vpopmail passwd is a server, written in c and is used to change vpopmail user passwords remotely, works with most wide-used webmail, and email (with password-change function, e.g. The Bat!) clients.
VTQLserver provides parallel access to cached videotext pages of several tv-stations via the query language VTQL.
wchat is a Chat Server written in the C language. It was originally based on chatC code, but then expanded to be a fully functional chat environment.
a server program that will allow you to host a webcam, provided your webcam is supported by video4linux
a linux PPTP server. After few minor changes it can be used
as a client, too
X-TrueType Server is an X server and/or an X font server that can handle TrueType fonts directly.
provides full function Oper and Channel services to an ircu based IRC network.
xcin is an X Input Method Server for Chinese, including Big5 and GB encoding.
X11 Font Server for TT fonts". Xfstt is freely available under the LGPL
an accelerated and fully multihead capable X server which uses LibGGI to do hardware independent graphics and input. It supports 8, 15, 16,
24 and 32 bit modes on any LibGGI target that has a pixellinear DirectBuffer
a standalone utility for sharing an X Window System session on multiple X displays. It allows users to see and interact with the same applications at the same time from different locations
XSuSE-Servers and XFCom-Servers
a small series of X servers. These servers are based on source code from XFree86-servers, but enhance and
freeware radius server implementation. The main feature is the handling of user accounting informations via external fully configurable scripts
Xynth is an embedded and portable interface between display hardware (the mouse, keyboard, and video displays) and the desktop environment that works on a variety of hardware, including embedded devices such as handhelds and set-top boxes.
Linux NIS(YP) Server
Zentyal (formerly eBox Platform) is a Linux small business server that offers small and medium businesses an affordable and easy-to-use enterprise-level computer network.