Libvorbis is the reference implementation for the Ogg Vorbis audio file and compression format from Xiph. It provides high fidelity encoding even at low compression ratios, and is widely used by open source and commercial applications.
Beast is a music composition and modular synthesis application. As input methods, it offers a multitrack editor, a piano roll, and supports pattern editing. It has a wide range of technical abilities like sequencing, unlimited undo/redo history, real-time synthesis with multiprocessor support, full duplex 32-bit audio rendering, seeking at sample granularity, on demand loading of partial wave files, on the fly decoding of various sample formats, aliasing free oscillators, and full scripting supp
The program gst123 is designed to be a more flexible command line player in the spirit of ogg123 and mpg123, based on GStreamer. It plays all file formats supported by GStreamer, so if you have audio/video collections which contain different file formats, like flac, ogg and mp3, you can use gst123 to play all your audio/video files.
ICEcast is a audio/video streaming media server. Which supports Ogg Vorbis, Ogg Theora, FLAC over Ogg, Opus, Speex in Ogg, WebM and MP3 audio streams. It's widely used for setting up public internet radio stations, or local jukebox servers. ICEcast is flexible and extensible with new media formats and functionality.
Oggify is a command-line tool to convert between different audio formats. It's foremost intended to manage OGG Vorbis based collections, but also supports FLAC, or MP3 for older players, ALAC and MP4 on Mac OS X.
mp3splt breaks up MP3, OGG Vorbis and FLAC audio files without decoding. It doesn't require pre-defined timestamps but CUE or CDDB meta info, or by detecting album or stream audio silence breaks. It's a command-line tool, but a Gtk+ interface is also available.