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Jabber.com, Inc - http://www.jabber.com/
Provider of custom Jabber client/server solutions for corporations. Major funder of the Jabber.org project and author of the JabberIM windows client. |
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ejabberd - http://www.ejabberd.im/
Free and Open Source distributed fault-tolerant Jabber server which is mostly written in Erlang and runs on many platforms. |
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Openfire Server - http://www.igniterealtime.org/projects/openfire/
Cross-platform, open source XMPP server written in Java, with web based administration. |
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Prosody IM - http://prosody.im/
A lightweight, open source Jabber server. It is written in Lua and aims to be easy to configure, use, and extend. |
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OpenIM Java Jabber Server - http://www.openim.techlab.smk.fr
Open source Jabber server implementation aiming to produce a fast, simple, and efficient server with modularisation. |