PSP Audioware - i cant say enough good things about the audio quality and realism of PSP plug ins...and the Vintage Warmer is still my favorite software compressor...i use PSP plug ins every mix...

ISK Microphones & Headphones :    the HD-9999 headphones -- the @ 2Beauty tube mic --- the Starlight -- the Pearl ...the ribbons are really cool too.... I just finished 2 songs where all the vocals and guitars were recorded with these mics...it's kind of crazy how good they are...

Keleman/Jo Mama Amps - its like an AC15 on steroids...i own a lot of amps and this one gets used more than any other in the studio....and with it's switchable output settings it's awesome for gigging...primeVibe - 

primeVibe - improved the resonance/sound of several guitars i own...