Commercial

Cycling74

http://www.cycling74.com/ - Company: The commercial version of Puredata known as Max/MSP. Largely compatible with Pd but a nicer GUI interface and professional patch management facilities aimed at the studio musician.

Earcom

http://earcom.net/ - Project leader: Paul Weir. A group working on aesthetically sensitive interactive and generative music for airports, supermarkets and other public spaces. Developing in Max/MSP language. Server based management, generation and delivery of procedural audio content. Public sound installations in spaces such as Glasgow and Heathrow Airports and the chain of Tesco supermarkets in the UK.

Native Instruments

http://www.native-instruments.com/Company: Authors of possibly the best software synthesiser ever produced? Reaktor is certainly the most widely used. Also designers of the Kontakt format, a versatile sample bank specification.

Seer Systems.

http://www.seersystems.com/Company: Still actively researching and developing prodecural music generation and delivery systems after 10 years, many products for the Windows PC including the much applauded Reality software synthesiser.

Have I forgotten you? Sorry. Are you not on this list but actively doing R&D in generative music, synthesis or sound with games or interative applications? - please drop the author an email with a brief summary