Audio Enhancer for Windows and Embedded Platform
Audio DSP FX and plug-ins, mostly for guitar (amp sim) and other FX
a VST version of radio_chung
Faust is a programming language for realtime audio signal processing
Audio plugin bundle over the LV2 standard for Linux
OpenAL output for foobar2000 v1.1+
The best DSP available, and even open source.
Audio Monster Player is a music player
A light-wieght audio player for Linux, Windows, and Mac