Fallout Warfare is a set of miniatures rules for playing games set in the universe of the acclaimed Fallout computer game.
Redjack has an attractive photo gallery of figures from the late, but great Warzone game. I’ve got a ton of those figures myself.
There also are a couple of Warzone scenarios and house rules
Ramshackle Games offers Nuclear Renaissance, a set of free, downloadable rules for playing skirmishes set in a post nuclear holocaust. There’s both a full color, and a printer friendly set.
The game puts me in mind of one of the favorites from my childhood — Gamma World. You had to love that chart for checking out various objects you discovered.
Legends of Time and Space is Dark City Games’ rules set for tactical science fiction role playing. It’s based on the well-loved, out-of-print Fantasy Trip system.