I've mentioned before that my club plays spaceship games extensively using a variety of rulesets. However, the most widely used by all members of our club is a custom permutation of the beloved Full Thrust rule set that we have dubbed 'Extreme Thrust'. The rules are available for download here:
http://extremethrust.zxq.net/index.htm
Premade fleet lists for a variety of universes exist already so you can jump in, or you can custom design ships with the ship creator rules. The ruleset has been extensively playtested, and provides a nice alternative to Full Thrust by adding more depth to fighter combat and other areas. The gallery will soon have pics of all the clubs' fleets. So if you're bored, and want to try something new, give it a shot.