An Internet search engine, consisting of an indexing robot, a search daemon, and a CGI search frontend. (C++) [GNU/Linux, FreeBSD]

Devoted to fostering an open source digital rights management system.

A server for applications running into thin-clients PCs. It resembles the Web in many ways, but supports stateful sessions. (Python)

Open source xinetd/tcpserver based IMAP server for the Linux platform, with support for Maildir.

Widely-used DNS server software, and related tools. (C) [Many platforms]

Discussion board with admin page in english, french, german, italian, spanish, dutch. (PHP4)

A single process multi-threaded webserver with a built-in pre-processing language and XSLT-support. (C, Pike) [GNU/Linux, Unix]

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

An IMAP server developed at Carnegie Mellon University. (C, Perl) [GNU/Linux, Unix]

Open source search engine tool released under GPL and designed to organize search within a website, group of websites, intranet or local system.

A web control panel for dns administrators. DNS information is stored in mysql and can be output to either BIND or tinydns files. (C) [GNU/Linux, Unix]

An IP address update program for dynamic DNS updates as defined in RFC2136. It submits dynamic IP address update requests to a name server automatically. (Perl) (Linux)

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

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

Open source tool to automatically download and install available software packages for Linux server configuration; includes a complete set of web and mail services.

A system for managing a variety of directory services, such as NIS, DNS, Samba, Sendmail, and tacacs+. (Java)

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

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)

A tiny and simple http server that runs under inetd. It supports HEAD/GET/POST, and IPv6.

Provides IRC networks with definitive nickname and channel ownership, allows messages to be sent to offline users, and gives IRC operators more control. [GNU/Linux, Unix]

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

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

Open source e-mail filtering solution for Linux e-mail servers. (C, Perl) [Linux, BSD]

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

A template engine for PHP. It converts the templates into native php scripts upon the first execution. (PHP)

SpeedyCGI runs scripts and keeps the perl interpreter running in memory. During subsequent runs, this interpreter is used to handle new requests. (C, Perl) [GNU/Linux, Solaris, FreeBSD, OpenBSD]

An RFC1939 and RFC2449 compliant POP3-server, with virtual domain support and the possibility to authenticate users in several different ways. (C) [GNU/Linux, OpenBSD, Solaris]

Daemon which proxies TLS connections into services which don't support TLS themselves. Readme file, change log, man page, and tarballed source. Requires OpenSSL. (C) [GNU/Linux, Unix]

Pop 3 server designed to be fast, extensible, and secure. Version history, FAQ, overview, and tarballed source distribution. (C) [GNU/Linux, Unix]

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