Last Thursday was listening to an interesting BT interview on KCRW (ooh here’s a Mark Farina interview) where he talks about some general career/new album stuff, but also nerd-talk (starts around 17m in). One thing that surprised me was his shout out to Richard Boulanger (hmm, well BT did attend Berklee for a little while). Apparently he’s been working with Luigi Castelli on CSound stuff (hey there’s a csound max/msp object) Music software is really it’s own world (dmoz, random listing); not too much OSS stuff I can spot, however jMax is GPL’d.
There’s a Remix article entitled The Mad Professor that has some more interesting tidbits.
Not mentioned, but I came across it while searching, kyma looks pretty neat