Commercial

Amiga - does it really need any introduction? This is the official homepage of Amiga.
Roland - synthesizers, mixers, soundcards, sound modules, harddisk recorders. You name it.
Eizo - super monitors.
Digibooster - home of Digibooster, the best multichannel tracker for Amiga.
Jean Michel Jarre - the grand father of electronic music

Other

IRIS - my Amiga demo scene group.
Exotica - Amiga nostalgia umlimited.
AHI - the Amiga sound retargetable system. You need this if you want to mix music in Digibooster.