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
Science Fiction
Legends of Time and Space RPG
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.
Modern – Futuristic Cargo Container Paper Models
Marcos at Topsolitario offers a set of free paper models of cargo containers for your modern and futuristic miniatures games. They are quite lovely. There’s even a video showing how to build them.
Steel Rain Sci Fi Rules
Steel Rain is a set of rules for 1/300 scale science fiction miniatures.