1. PyacoustidPython bindings for Chromaprint acoustic fingerprinting and the Acoustid Web service
2. Beetsmusic library manager and MusicBrainz tagger
3. Audioreadcross-library (GStreamer + Core Audio + MAD + FFmpeg) audio decoding for Python
6. pylastfpPython bindings for Last.fm's "fplib" acoustic fingerprinting library