Below are download links to free software that I maintain.
An optimizing compiler for the MPEG 4
Structured Audio language, sfront converts SA files into
efficient C programs that generate audio. The programs sfront
creates may be
used interactively as a musical instrument or audio effects processor.
Sfront supports network
musical performance and acts as the
reference implementation for
Chipmunk   Electronic computer-aided-design tools for schematic
and logic simulation, VLSI
layout and LVS, data
viewing, and drawing.