Domain Technologie Control
- A set of PHP scripts for domain administration, MySQL management database, backup scripts generation and scripts for statistic calculation.
- http://www.gplhost.com/software-dtc.html

OpenProtect
- Open source e-mail filtering solution for Linux e-mail servers. (C, Perl) [Linux, BSD]
- http://www.openprotect.com/

Ganymede
- A system for managing a variety of directory services, such as NIS, DNS, Samba, Sendmail, and tacacs+. (Java)
- http://tools.arlut.utexas.edu/gash2/

IRC Services
- 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]
- http://www.ircservices.za.net/

Cyrus IMAP Server
- An IMAP server developed at Carnegie Mellon University. (C, Perl) [GNU/Linux, Unix]
- http://cyrusimap.web.cmu.edu//

Bind
- Widely-used DNS server software, and related tools. (C) [Many platforms]
- http://www.isc.org/sw/bind/

dnsadmin
- 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]
- http://www.inter7.com/index.php?page=dnsadmin

MyServer
- Web server administration supporting HTTP, CGI, ISAPI, WinCGI and FastCGI protocols.
- http://www.myserverproject.net/

DataparkSearch Engine Tool
- Open source search engine tool released under GPL and designed to organize search within a website, group of websites, intranet or local system.
- http://www.dataparksearch.org/

ihttpd
- A tiny and simple http server that runs under inetd. It supports HEAD/GET/POST, and IPv6.
- http://i1.dk/download/ihttpd/index.html

Postfix
- A compatible, more secure replacement for sendmail program, which transfers mail over the internet. (C) [GNU/Linux, Unix]
- http://www.postfix.org/

Dnsupdate
- 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)
- http://www.btree.org/dnsupdate/

Binc IMAP
- Open source xinetd/tcpserver based IMAP server for the Linux platform, with support for Maildir.
- http://www.bincimap.org/

Authena Open Source DRM
- Devoted to fostering an open source digital rights management system.
- http://www.authena.org

Exim - Mail Transfer Agent
- Message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
- http://www.exim.org/

tlsproxyd
- 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]
- http://www.ex-parrot.com/~chris/tlsproxyd/

tpop3d
- Pop 3 server designed to be fast, extensible, and secure. Version history, FAQ, overview, and tarballed source distribution. (C) [GNU/Linux, Unix]
- http://www.ex-parrot.com/~chris/tpop3d/

UnrealIRCd
- An IRC daemon with SSL support and WebTV support. (C) [GNU/Linux, Unix, Windows, Amiga]
- http://unrealircd.com/

ht://Dig
- A complete world wide web indexing and searching system for a small domain or intranet. (C++) [GNU/Linux, Unix]
- http://www.htdig.org/

MnoGoSearch
- Search engine software for Internet and Intranet sites. The index can be stored in any of the popular SQL Databases.
- http://mnogosearch.org/

Teapop
- 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]
- http://www.toontown.org/teapop/

HTML::Embperl
- 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)
- http://perl.apache.org/embperl/

Courier mail server
- An SMTP/IMAP/POP3/HTTP (webmail) server, implementing SMTP extensions for mailing list management and spam filtering. (C, C++, Perl) [GNU/Linux, Unix]
- http://www.courier-mta.org/

Board-tnk
- Discussion board with admin page in english, french, german, italian, spanish, dutch. (PHP4)
- http://www.linux-sottises.net/software.php

ASPSeek
- An Internet search engine, consisting of an indexing robot, a search daemon, and a CGI search frontend. (C++) [GNU/Linux, FreeBSD]
- http://www.aspseek.org/