A New Kind of Instant Messaging
A free and reliable P2P BitTorrent client
A universal instant messaging (IM) program
Weak signal ham radio communication
Ham Radio Digital Modem Application
You can message and share files inside your intranet without a server.
Search, Download, Play, Share on Bittorrent and the cloud
SMTP email proxy and relay server
Psi+ Project — development branch of Psi XMPP client
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Library to control radio transceivers and receivers
Development toolkit for Web Services and XML data bindings for C & C++
Linux Infrared Remote Control
Fast Bayesian spam filter along lines suggested by Paul Graham
A GTK+ Gnutella client, optimized for speed and scalability
Client daemon to move mail from POP and IMAP to your local computer
Network transparent, client/server audio transport system
mailbox synchronizer
Components for IEC61375 standardised communication