The Grid Based Wargaming Blog has a set of free wargames rules for company level units using 28mm models and a 6 inch grid.
Harry Pratt’s Battlestar Galactica Starship Combat Rules are designed to recreate starship combat rules from the msot recent Galaxtica television shows.
I have to say that the fleet combat sequences in the series are absolutely spectacular, with those missles streaking through space and the ships burning up under multiple hits. Perhaps not the most scientifically valid, but spectacular nonetheless.
The Death Zap blog offers a set of free wargames rules for small unit combat. There’s also a fun battle report that goes with them.
I absolutely love the Full Thrust starship rules. If you can’t get enought of the rules, there’s now a Full Thrust Wiki.
We all knew that cds — especially those free ones you get in the mail — make great bases for terrain pieces. But who knew that you also could use the spindles. Here is a photo tutorial on using the spindles to make science fiction terrain pieces — such as fuel tanks, etc.
The site is in Spanish, but the photos speak for themselves.