Asterisk is an insanely powerful, yet easy to use, open source voip telephony toolkit (server software) that runs on virtually any platform. Asterik is a by-product of Revision3, a friend of Digg.

Fluendo GStreamer MP3 Plug-in is a combination of multiple things: a MIT licensed source code package implementating the mp3 codec, a fully licensed binary GStreamer plug-in available for download (and) a redistribution contract allowing distributions to distribute the binary Fluendo GStreamer MP3 plug-in free of charge.