Gloves Ultra is a remarkably quick, thorough, full color GM's tool for FIST.
It whips up maps, PCs, NPCs, missions, and does so with full color, X-Com style graphics.
FIST is already pretty simple to run, but this makes it even easier, and has some charming flair besides. If you like computerized GM tools and you like FIST, this will probably fit perfectly into your kit.