several vaguely related projects worked on by me: a 3d engine with a javascript-like scripting language (pdsys); an older scheme dialect (vmsys); ... (2009-04-28: I have been gone for years, may try to put up some newer stuff...).
sr-convert is a command-line sample-rate converter for WAV files, which supports a wide variety of sampling rates, and achieves very high sound quality. It runs on Windows (MinGW) and x86 Linux systems, and makes use of SSE instructions if available.