Brilliance pads work good, but dry a little slow. Love their metallic colors.
Staz-on dries really fast and works nice too. Make sure you clean your stamps immediately though.
LOVE the fluid chalk inks, but dries pretty slow.
One of my favorites are Clearsnap Ancient Page inks, great colors and permanent, dries a little slow.
Alcohol inks can be dabbed on stamps. Works a lot like Staz-on in my experience, but you get a more translucent effect. Clean stamp immediately.
Palette Hybrid ink is really nice too. Ink dries pretty fast. Nice colors.
That's all the ones I've tried :)