Gotta love necromancy!
A few games I've encountered over the last few years:
Hard Nova )( by Precis Intermedia Games: Point buy character generation, roll under attribute+skill on 2D6. Very rules light. Space combat uses the same numerical scale and systems as character combat. The built in setting has a space opera feel. Not as detailed as Traveller, but very cheap, and easy to get started. I bought the PDF package, with an expansion and a lot of beginning scenarios, for not much money.
X-Plorers by Grey Area Games: a D&D retro-clone, uses the standard 3-18 stats, with four character classes: Soldier, Tech, Scout, and Scientist. Each has class skills, using a roll over D20 mechanic, like old D&D saving throws. Combat is D&D with ascending armor class, eg. unarmored is AC 10, leather is ac 12, etc. Experience gets you higher levels, more hit points, etc. Ships are basic, with hits, armor class, etc. in six size classes. Essentially D&D in space, without magic. I got mine as a free download.
QAGS by Hex Games: a generic rules set, but with supplements for various settings. The Sci-Fi setting is called "Rocket Jocks". Chargen is point buy, and very abstract. Characters have the stats Body, Brains, Nerve, Job, Gimmick, and Weakness. All run 6-16 for normal humans, but can go as high as 19, or low as 1. All tasks use a D20 roll under mechanism they compare to "The Price is Right": roll as high as possible without going over. This makes contested rolls easy to judge. My favorite rule, they gve experience in 'Yum-Yums', and recommend using candy. The GM can use these Pavlovian rewards to reinforce desired behavior. Players can bribe the referee to get better results, save Yum-Yums to spend on better stats, or eat them. The basic rules can be had for free at their website. The printed rules don't cost much, and the setting supplements are available as cheap PDFs. Be warned, the writers have a locker room sense of humor, and cuss a lot.
Spaceships have the same stats as people, only multiplied by a size code. Small ships seem more survivable than in Traveler, big ships more vulnerable. The setting has a very space opera, goofy feel.