MIXX is an open source digital mixer. It helps you manage the content, music, live calls etc.... you can dlownload it free at
BUTT (Broadcasters Using This Tool) is available for free open source download at
butt (broadcast using this tool) is an easy to use, multi OS streaming tool.
It supports SHOUTcast and Icecast and runs on Linux, Mac OS X and Windows.
The main purpose of butt is to stream live audio data from your computers Mic or Line input to an Shoutcast or Icecast server. Recording is also possible.
It is NOT intended to be a server by itself or automatically stream a set of audio files.