Spawner

(though in russian). Also Helios mod spawns too much for the game to remain challenging. It is intended for v1.5.05 of Clear Sky, although works on 1.5.03 and 1.5.04 as well.
This mod spawns cars, dogs and weapons by an auxilliary menu. It is an alternative to Helios mod with cars, that I've found on a russian site. You don't have to memorize any keys - it has a full menu