Not trying to steal any thunder, but i made these a long time ago, however still not really convinced about my own Terran design.
RaceLogos
Terran - Metal feel, but not satisfied with the overall design.
Cathaar - Grey/Silver, Look like a Insect/Bug type thing.
Xandatrii - Green, Spiky, X like in shape.
Zik - Red, and unusual (like stolen ships would be)
Etd - Pretty random logo, but notice the E and backward E, and the A shape at the bottom.
Note: I did just change some the race names like there some are in the OP, so i dont want to say I thought of those names my self :P
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<Kila> WHAT HAVE YOU DONE WITH MY PRECIOUS FORUMS
<Zeyi> 24h forum closure
<Zeyi> all posts recalled
"he's got a proven track record when it comes to showy art composition" - Tommy
<Sigi> Light: can I ask u how many open internet-windows u always have?
<MrLobster|PM> i have 2, the pa page, and the website for naked light pictures
<Ave> both has bad gfx