Here are the relevant images from this episode of Gimme That Star Trek!
Gimme That Star Trek presents a sample of each game's look, starting with the FASA game:
Prime Directive, original and powered by GURPS:
Last Unicorn's Star Trek the Next Generation RPG, with unboxed Way of the D'era:
Decipher's core books:
The latest in the line is Modiphiüs' Star Trek Adventures:
And here's the fancy Borg Cube edition of that same game: