Weird Worlds: Like the Best Chips You've Ever Eaten
A simple game, really - fly around, find things, find enemies, kill them and take their stuff. Combat is there, is very pretty, and has chess-like complexities. The guts are laid out for the modder who wants to make this their own - mods from Firefly to Trek are in the works. Digital Eel just open-sourced the code to the original Strange Adventures in Infinite Space. These guys get it.
And you should get it too! Delivery is quick, and publisher Shrapnel Games is close to releasing it via digital delivery.