Frag Grenade
A standard Frag Grenade that produces a lethal blast radius upon detonation. Frags can be cooked to shorten the fuse time.
Semtex
Sticks to any surface. They can't be cooked since they are timed explosives.
Throwing Knife
Takes out an enemy with one hit, but it must be picked up to be used again.
I.E.D.
Improvised proximity explosive that sticks to the environment. It arms itself shortly after being deployed.
C4
Remote controlled C4 that sticks to any surface.
Canister Bomb
Chemical bomb that needs to be primed before being released.
Source: http://www.codghosts.net/