DromeAudio is a small audio manipulation and playback library. It features a simple API for loading, generating, processing, and playing audio. Some of its features include loading and saving WAV sounds, loading Ogg Vorbis sounds, audio mixing/playback, and dynamic audio processing effects such as pitch shifting and echo.
Calf is a set of audio effect plugins. Several plugins are provided: flanger, reverb, multimode filter, vintage delay, phaser, simple monophonic VA synthesizer, and organ/pad synthesizer. LADSPA+LRDF, DSSI, and LV2 versions are available, as well as GTK+ based UIs and a standalone application using GTK+2 and JACK.
cdrkit is CD Recording Kit, a collection of applications related to creation of optical disk media on Unix platforms, from creation of the filesystems used on such media to the actual burning process. It is heavily based on the cdrtools package (partially developed and maintained by Joerg Schilling before), but is maintained independently.
jMList is a small utility that scans one or more given directories for media files (currently only audio files) and generates a XML listing of the whole directory tree with information about each media file such as file size, song length, title, author, album, etc. A XSL stylesheet can be applied to the output to transform it into a different output such as tabular or tree listings in plain text, XML, HTML, RDF, RSS, or any other XML format.
Tao is a software package for sound synthesis using physical models. It provides a virtual acoustic material constructed from masses and springs, which can be used as the basis for building quite complex virtual musical instruments. It comes with a synthesis language for creating and playing instruments and a C++ API for those who would like to use it as an object library.