A complete world wide web indexing and searching system for a small domain or intranet. (C++) [GNU/Linux, Unix]

A compatible, more secure replacement for sendmail program, which transfers mail over the internet. (C) [GNU/Linux, Unix]

Message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

An SMTP/IMAP/POP3/HTTP (webmail) server, implementing SMTP extensions for mailing list management and spam filtering. (C, C++, Perl) [GNU/Linux, Unix]

Web server administration supporting HTTP, CGI, ISAPI, WinCGI and FastCGI protocols.

A HTTP and mail proxy server licensed under a 2-clause BSD-like license. By Igor Sysoev. [Unix, Mac OS X]

A set of PHP scripts for domain administration, MySQL management database, backup scripts generation and scripts for statistic calculation.

Gives you the power to embed Perl code in your HTML documents and the ability to build your Web site out of small reusable objects in a OO-style. (Perl)

An IRC daemon with SSL support and WebTV support. (C) [GNU/Linux, Unix, Windows, Amiga]

Search engine software for Internet and Intranet sites. The index can be stored in any of the popular SQL Databases.