No Logo Mod
Do you like waiting 10 seconds for the EA logo movie to play when C&C3 starts? If not, then you should definitely check out the C&C3 No Logo Mod!
Editor: in progress and available for download
Currently, TibEd 2 comes with an early version of an editor for Command and Conquer 3: Tiberium Wars. This version does not yet have the classical TibEd GUI, but it does make editing a lot easier than editing the C&C3 Mod SDK by hand. For more information, look at the TibEd 2 page.