Apache Webserver
The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows NT.
X5
X5 is the latest generation web server from iMatix Corporation.
Savant
Savant is a freeware open source web server that runs on Windows 9x, ME, NT, 2000, and XP turning any desktop computer into a powerful web server.
MyServer
MyServer is a powerful and easy to configure web server.
Jigsaw
Jigsaw is W3C's leading-edge Web server platform, providing a sample HTTP 1.1 implementation and a variety of other features on top of an advanced architecture implemented in Java.
WinNFSd
WinNFSd is a free, open source Network File System (NFS) server for Windows.
SOSSNT
SOSSNT is an NFS server for Windows NT and 2000.
OpenSSH for Windows
OpenSSH for Windows is a free package that installs a minimal OpenSSH server and client utilities in the Cygwin package without needing the full Cygwin installation.
Squid
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more.
hMailServer
hMailServer is a free e-mail server for Microsoft Windows.
shicks!
A portable, free POP3/SMTP server, written in Python.
XMail
XMail is an Internet and intranet mail server featuring an ESMTP server, POP3 server, finger server, TLS support for SMTP and POP3 (both server and client side), multiple domains, no need for users to have a real system account, SMTP relay checking, DNS based maps check, custom (IP based and address based) spam protection, SMTP authentication (PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom), a POP3 account syncronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code.
Enhydra
Enhydra Server is an Open Source Java application and webservice server including standard Apache Tomcat (or alternatively Jetty) and Apache Axis with a very big difference ! While the servlet API is used to support presentation logic, the platform contains just about all enterprise level services to build extreme high volume web sites in an n-tier architecture.
Openfire
Openfire is a real time collaboration (RTC) server licensed under the Open Source GPL.
Zope
Zope is an open source application server for building content management systems, intranets, portals, and custom applications.
XAMPP
XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl.
Pure-FTPd
Pure-FTPd is a free (BSD), secure, production-quality and standard-conformant FTP server.
OpenIM
OpenIM Java XMPP/Jabber Server is an open-source Java implementation (BSD License) of XMPP/Jabber Instant Messager.
FileZilla Server
FileZilla Server is a reliable FTP server for Windows.
Duel DHCP DNS Server
Works as a DHCP or DNS Server or both.
Plone CMS
Plone is a powerful, flexible Content Management solution that is easy to install, use and extend.
Ident Server
Simple Ident (authentication) server.
AnomicFTPD
An enterprise-suited, RFC959 compliant terminal-based ftpd server in Java.
CVSNT Server
CVSNT is a lightweight but powerful version control server.
ejabberd
ejabberd is a Jabber/XMPP instant messaging server, licensed under GPLv2 (Free and Open Source), written in Erlang/OTP.