Sendmail is a Mail Transport Agent (MTA). It is suitable for handling sophisticated mail configurations, but this means that configuration can be complex.
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Sendmail is a Mail Transport Agent (MTA). It is suitable for handling sophisticated mail configurations, but this means that configuration can be complex.
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qmail is an Internet Mail Transfer Agent (MTA). It was written as a more secure replacement for the popular Sendmail program.
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chasquid is an SMTP (email) server with a focus on simplicity, security, and ease of operation. chasquid is free and open source software.
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Citadel/UX (commonly known as Citadel) is an open source, complete and feature-rich collaboration suite (messaging and groupware).
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Dovecot is a mail server whose major goals are security and extreme reliability. It seeks to handle all error conditions and verify that all data is valid.
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Cyrus IMAP is an email, contacts and calendar server intended to be run on a “sealed” server.
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The Courier mail transfer agent is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP.
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Postfix is a free and open source mail transfer agent (MTA), a computer program for the routing and delivery of email.
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Zimbra Collaboration Suite (ZCS) is a groupware product developed by Zimbra Inc. Zimbra consists of both client and server components.
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DBmail is the name of a group of programs that enable the possibility of storing and retrieving mail messages from a database.
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OpenSMTPD is an implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions.
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Exim is an open source mail transfer agent (MTA), which is software responsible for receiving, routing, and delivering e-mail messages.
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rdesktop is an open source client for Windows Terminal Services, capable of natively speaking Remote Desktop Protocol to present the user’s Windows desktop.
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Vinagre is a VNC client for the GNOME Desktop. It allows the user to view multiple machines simultaneously.
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Dayon! is an easy to use, cross-platform remote desktop assistance solution.
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xpra (X Persistent Remote Applications) is ‘screen for X’. This application allows users to run X programs, usually on a remote host.
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OpenSSH is a free version of the SSH suite of network connectivity tools that increasing numbers of people on the Internet are coming to rely on.
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xrdp provides a graphical login to remote machines using RDP (Microsoft Remote Desktop Protocol).
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Connections aims at replacing Vinagre as the remote desktop client for GNOME.
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TurboVNC is a high-performance, enterprise-quality version of VNC based on TightVNC, TigerVNC, and X.org.
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