IMAPFilter is a mail filtering utility. It connects to remote mail servers using the Internet Message Access Protocol (IMAP), sends searching queries to the server, and processes mailboxes based on the results.
Prosody is a server for Jabber/XMPP written in
Lua. It aims to be easy to use and light on
resources. For developers, it aims to give a
flexible system on which to rapidly develop added
functionality or prototype new protocols.