- ffmpeg2theora a commandline encoder from any format read by ffmpeg to Ogg Theora/Vorbis: svn, latest releases.
- Visonair.tv Ogg Streamer A windows application to stream directly from a webcam to an Icecast server.
- Visonair.tv Virtual Stage Includes an application to encode to Ogg Theora, forces fixed size and encoding parameters though. Registration required.
- VLC Media Player Can transcode from any source it supports into Ogg/Theora/Vorbis.
- Freej Freej is a realtime video mixer. It can stream ogg theora vorbis live to icecast. Check here for more info.