Open Source Audio Library Project - The OSALP is a C++ class library that contains everything one needs to build an audio application. It contains a powerful chaining concept so programmers can build an audio application by selecting the building blocks they need. osalp.sourceforge.net
Sound & MIDI Software For Linux - This site has links to everything related to music on Linux. Also has links to programming documentation, sound repositories, other sites etc. Updated frequently. sound.condorow.net
Sweep - Sweep is a sound wave editor. It operates on files of various formats such as .wav, .aiff and .au, and has multiple undo/redo levels and filters. sweep.sourceforge.net
terminatorX: main - terminatorX is a realtime audio synthesizer that allows you to "scratch" on digitally sampled audio data (*.wav, *.au, *.mp3, etc.) the way hiphop-DJs scratch on vinyl records. www-stud.fht-esslingen.de/~alkoit00/tX
The Linux Ultra Sound Project - This project is based on Jaroslav Kysela's new low-level driver for the Gravis UltraSound cards. The project is developed in Linux operating system (u*ix clone for i386/AXP/Sparc/...). www.perex.cz/~perex/ultra
Ultramaster RS101 - A realtime software Rhythmic Synthesizer for Linux. www.ultramaster.com/rs101
X MultiMedia System - A music player with most of the features as winamp from Windows 95/98/NT but features some special items only available for the linux version. www.se.xmms.org