Sites marked SE are in Swedish, the others are in English or have an English version.
Forums and groups
Language of adaptive music, Yahoo group on adaptive music theory.
IASIG, Interactive Audio special interest group.
Project BBQ - "The Premier Interactive Music Think Tank"
Game Audio Network Guild
InteractiveSound.org
Academia and institutes
Interactive Institute, Sweden
KTH Speech
IRCAM
CCRMA
Misc.
Java Music Specification Language, with some algo music demos
Wolfram Tones
Articles
Defining Adaptive Music, (Gamasutra 2007 april 17)
Books
George Sanger: The Fat Man on Game Audio: Tasty Morsels of Sonic Goodness
David Cope: Experiments in Musical Intelligence
Game Audio Middlewares and Tools
Synths, Samplers and Sounds
Propellerhead Software
Native Instruments
East West Samples
Garritan
Clavia
Midi
Midi Manufacturers Association, midi.org
MidiYoke, virtual midi cables
Midi-ear, audio to midi capture
Sequencers and plugins
jVSTwRapper, The Java Way Into VST World
Java vs. C++ performance (Killing the "Java is slow" myth)
Musicians forums
Vi musiker SE
Gaming forums
Game Elite, SE
Network
IQube, SE
ALMI, SE
Vinnova, SE
Innovatum, SE
STING