1) Fuzz. I believe Silicon for Axis and later, germanium for anything before.
2) Wah. Duh.
3) Octave
4) Uni-vibe

If you want more info, ask in Guitar Gear and Accessories.


How to achieve Frank Zappa's guitar tone:
Quote by Thefallofman
Step 1: Buy a Gibson SG
Step 2: Insert Green Ringer, EQ, 3 dead squirrels and a microwave into said SG
Step 3: Plug in and freak the **** out.