Open Source IM and voice client using Jabber and SIP protocols, with great audio quality thanks to speex and a nice and clean interface. Programmed in Java and C++. It supports chat, voice and file transfers.
Multi-platform/multi-language program that easily synchronize local and remote directories. Based in rsync, it allows to do incr.backup, mirroring, web upload, team work, etc. It send by e-mail generated public keys. Command line and GUI available.