In continuation of this topic.
Ideas (Original from Maks, with some little additions from me)
Molotov Cocktail:
For the people who dont know what a Molotov Cocktail is: A Molotov Cocktail is a bottle filled with benzine, and a towel in it. If you fire the towel, and throw the bottle against the floor or a wall, the bottle breaks in pieces, and the benzine is gonna catch fire. That will burn some seconds, and if someone walks through it, it will work the same as a flamethrower. You can also throw to tanks (crazytank ) and more vehicles.
Toxic Grenade:
The toxic grenade works kinda like the smoke grenade, it will detonade when its not moving anymore. Then you wont see much smoke, you will see only a little bit yellow smoke, but not much. When you come in some kinda range, you will die slowly, like you drown but with more damage. But you wont heal again after you came out.
Nerve Gas Grenade:
This is deathly gas, but it will work after a few seconds. First you'll walk slower. Then after 15 seconds, you will die slowly. The only thing that can save you is winning the round fast.
Noise Grenade:
This grenade is more like a flashbang, but instead of blinding it creates a very high peep for 2 seconds, and after that you are deaf for the rest of the round. This is annoying because sound is very important in a game like CS. You dont know it yourself, but its true, try playing without sound! Much more difficult!
Just some idea's
Fluffy said before the molotov cocktail would be difficult, because of the model. But I maybe got one.