G.I.S.S. : Global Independent Streaming Support ( http://www.giss.tv ) : is a free software based internet broadcast network devoted to free media. It is not a generator of contents but a common platform, based on icecast and ogg, for an everincreasing global network of streamers.
T.S.S : Theora Streaming Studio is a long awaited GUI for ffmpeg2theora. http://gollum.artefacte.org/tss/