At 94 pages, this PDF of spaceship warfare looks quite good.
This reminds me of Star Fleet Battles (SFB), with it's power allocation system.
I believe someone said it reminded them of SFB with the numbers filed off.
A good number of pictures to show off the various starship models from various manufacturers.
Also includes some themed fleet lists.
The Red Wyvern site does provide some downloads (even a printer friendly ship sheet!).
I would like to give it 5 stars, but the PDF is ink intensive.
A printer friendly version would have been good.
At £6.59, it's fairly good, and should remind you of SFB.
Worth a look at.