I've been seeing a bunch of geeky COEXIST images out there. Some are bumper stickers, some are tee shirt designs, some are simply art. The first two are my favourites:
Another very similar to the first design - no idea which was created first.
This version, by Michael McFarland was shared by George Takei
Here's another take on the space sci-fi theme:
by Steven Wolff ~bnsa on DeviantArt
Trek Wars Coexist (I like the Trek first)
These comic themed ones are good too:
Also from the artist who did the Trek Wars design above:
Coexist DC Marvel design by Brian Nielsen @ © SplitReason.com
See the 6 previous versions evolve into this design here
See the 6 previous versions evolve into this design here
Gamers Coexist
Posted on Shirtoid. Design by Fred Wood, available at Level Up Studios
OS Coexist
There are probably still more out there, but I'm kind of over it for now :)