I use Sennheiser microphones, Novation supernova rack, Technics KN1400 keyboard, electric guitar, various acoustic sound sources such as glass, pipes, bells etc, Korg D16 portastudio, TC M3000 reverb, Roland VP9000, Tascam MD350, Roland VS2480...awaiting arrival of Korg MR1 and Alesis DEQ230D equaliser.
I tend to put everything through everything else, at least twice. Sometimes when listening to mixes I hear a sound and can't remember how I created it - tends to bring in a certain amount of chance and chaos.
I also like trying to create chance in the mixes too - processing some sounds in real time without knowing exactly how they will fit to everything else.
No computer software at all at present.