Peter Alexander Publishing - Music, Recording amd MIDI books. Great tutoral books and more!
BestService - Audio CDs, all types
EYE & I Productions - Voice Crystal - One of the last places to get ram cards & sounds for older synths
Front Room- Sound Developers for Kurzweil Music Synthesizers.
Greytsounds - Sound Developers for Sampler CDs, Audio CDs and home to Sound Source Unlimited synth sounds.
Kid Nepro Productions - Synth sounds
Kurzweil K2000 Samples,Software - Sound Developers for Kurzweil Music Synthesizers.
ILIO - Sound Developers for Sampler CDs, Audio CDs and home to Groovemaker loop software
Patchman Music Synth sounds
Roland MKS-50 - synthesizer module. Patches, tones, support and software.