Multiplatform GUI of MP3Gain which adjusts volume of MP3 files
Runabc is a user interface supporting abc music notation software
Continuous display of audio spectrum from PC input or wave file
HarmonyHaven: Manage, organize, and play your music collection easily
Fast, bit-perfect audio editor that doesn't modify samples needlessly
C++ class library for sound analysis, synthesis, and morphing
Toolbox for speech processing. Realization of Voicebox interface.