a binary file format specification for storing network data
Boost.Join is an asynchronous, message based C++ concurrency library based on join calculus. It is applicable both to multi-threaded applications and to the orchestration of asynchronous, event-based applications.
an implementation of RTP, the real-time transport protocol from the IETF. ccRTP is a C++ library based on GNU Common C++ which provides a high performance, flexible and extensible standards-compliant RTP stack with full RTCP support
a small library that allows synchronous communication with an ftp server. It has implemented XS-interface, so you can use this library in Perl scripts
Easy Socket Library
supplies some functions to bind and connect socket, and to read and write variables of all simple types and strings. It's written in C, but there is also an interface for PHP3
to provide an easy to use programming interface to the serial ports of the Linux system
Fast Python Xmlrpc Library
an extremely fast implementation of the xmlrpc spec for Python (written in C). It supports both blocking and non-blocking clients and servers on Windows and POSIX platforms
a portable framework for writing flexible servers and clients in C. It includes builtin support for HTTP, DNS, base 64, XML
gsmlib is a library to access GSM mobile phones through GSM modems.
a tiny but useful http library and a command line tool to perform http queries
a low impact I/O library. It provides binary buffer capabilities with access methods similar to files
icqlib is a feature complete, open source, library implementation of Mirabilis' ICQ protocol available on the Internet. icqlib currently supports approximately 90% of the ICQ UDP v5 protocol and 80% of the ICQ TCP v2 protocol.
iksemel is a simple XML-parsing library written in C, oriented towards use in the Jabber network. It's fast, has low memory overhead, and is used in a number of embedded Jabber projects.
IP*Works! SSL for Linux
(commercial) adds SSL security, digital certificate generation, and certificate management capabilities to the base IP*Works! Linux class libraries. Supports secure implementations of every major SSL-enabled Internet protocol including: FTPS, HTTPS, SMTPS, POPS, IMAPS, LDAPS, SMPPS, XMPPS (Secure Jabber), SOAPS, WebDavS, etc. Digital Certificate creation, signing, and management features are also included
a Tcl client side library for IRC (Internet Relay Chat) programming. Its aim is to provide the underpinnings for IRC clients (e.g. chat clients, robots, services) written in Tcl
JVOIPLIB is an object-oriented Voice over IP (VoIP) library written in C++. It features Easy VoIP session creation and destruction, highly configurable sessions: sampling rate, sample interval, compression type and support for 3D effects.
a network library with the objective to easily create network test programs. This library provides network functionalities for Ethernet, IP, UDP, TCP, ICMP, ARP and RARP protocols
a Tcl package that provides an API for accessing and configuring Cisco network equipment over a telnet session. These library routines greatly simplify the process of writing scripts to make configuration changes and perform common tasks
a simple library wrapper written in assembly language (NASM syntax) that intercepts the calls applications make to establish TCP connections and transparently proxies them as necessary
a library to manage posting (or submission of) electronic mail using SMTP to a preconfigured Mail Transport Agent (MTA) such as Exim
a mail library. It is written in C
a C++ library that provides the DOM level 2 Core API for accessing XML documents
can be used to add basic web server capabilities to an application or embedded device. The library handles both static and dynamically generated content, has very low overheads, and provides many features to simplify the creation of web based application interfaces
an opensource C++ library being developed to support the icq2000/2001 protocol
libIRC is a cross-platform framework for connecting to and interacting with Internet Relay Chat (IRC) networks. libIRC is useful as the foundation for embedding IRC capabilities into various applications such as chat clients, games, and irc bots.
a C++ wrapper library for the Sendmails Milter mail filtering API. Its purpose is to facilitate object oriented programming of Sendmail mail filters in C++
Libnetcomm provides the required class and framework to manage TCP, TCPSSL and UDP connections.
Libnids is an implementation of an E-component of Network Intrusion Detection System. It emulates the IP stack of Linux 2.0.x. Libnids offers IP defragmentation, TCP stream assembly and TCP port scan detection.
libnodave provides the necessary functions to connect to and exchange data with Siemens S7 300/400 PLCs (200 family now also supported).
libports is a package that can be used for creating inbound and outbound sockets.
libsafe defends against buffer overflow attacks. It works by putting a wrapper around dangerous functions that contain any buffer overflows within the current stack frame, so that the return address can not be changed.
libsock implements a streamlined interface for multi-threaded TCP/IP socket programming. The main purpose of this library is to abstract the complexities of threaded network server programming without compromising performance.
a simple pop3 client library to be used by MDAs and/or MUA. libspopc's purpose is to help *non* network-aware C developpers to host easily a pop3 mail client in their programs
libstocks is a C library which can be used to fetch stocks quotes.
libstratanetsh (previously libnetshclient) is for use in the development of applications that require direct communication (using the 'netsh' protocol) with a Foxmoxie Networks STRATA-family router (or any server-type-application that supports the protocol).
Libtbb is an implementation of the TeamSpeak 2 UDP VOIP and chat protocol. It is implemented as a cross platform C library.
a TCP/IP client server class library that simplifies and speeds up development of client/server applications
libTLC54x is a library to communicate with the Texas Instruments TLC548/TLC549 8-Bit A/D-Converter via serial or parallel connector. The library just needs the device to be opened and than you can read data from the TLC54x. It hides the process of getting the data bit by bit and also hides the wait states.
libTlen is an object-oriented, cross-platform library which provides handling logic for the Tlen.pl communication protocol. libTlen is written in clear C++.
a highly modular, general-purpose client side Web API written in C for Unix and Windows (Win32). It's well suited for both small and large applications, like browser/editors, robots, batch tools, etc. Pluggable modules provided with libwww include complete HTTP/1.1 (with caching, pipelining, PUT, POST, Digest Authentication, deflate, etc), MySQL logging, FTP, HTML/4, XML (expat), RDF (SiRPAC)
a C library interface to the new Yahoo! Messenger protocol. It supports almost all current features of the protocol
Libzen is a library written in C++ that implements the BitTorrent protocol. It is currently at a very early stage of development. The aim of this project is to develop a stable library followed by a fully functional client application.
a library of C++ classes for flexible logging to files, syslog, IDSA and other destinations
provides a supported, forward-looking software technology path that will grow to support the new features of MPI-2 over time while interoperating well with both Linux operating system services and MPI/Pro for other platforms
msn-pecan is an alternative MSN protocol plug-in for libpurple. The goal is to provide much faster development than in the official libpurple (Pidgin) plug-in.
a library written to take advantage of Netscape's Third Party Mail and News API. This allows using your favorite e-mail client instead of Netscape's built-in mailer for handling mailto: urls, "Send Link", and other e-mail functions
an HTTP and WebDAV client library for Unix systems, with a C interface featuring high-level interface to HTTP and WebDAV methods (PUT, GET, HEAD etc), low-level interface to HTTP request handling and XML parsing using expat or libxml parser
a set of libraries and utilities for enabling Unix (mainly Linux) systems to communicate with a Psion palmtop over a serial line
an IRC library for Python. It provides basic and advanced characteristics for developing IRC applications
pysmb is an experimental SMB/CIFS library written in Python. The library has been tested to be able to connect Win 98 SE and Samba 2.0 machines, and upload/download files to and from these machines.