SW:TA is one of the longest running mod and creates a Total Conversion of TA including Imperial walkers, Starfighter dogfights, and Turbolaser Defense Batteries.
Troopers: Dawn of Destiny is a Total Conversion for Unreal Tournament 2003/4 that sports an exciting combination of all-new playable characters, breathtaking battlefields, completely authentic and technically realistic weaponry; and both old and new modes of team-oriented gameplay.
New Rebllion is a graphically beautful mod for Homeworld that gives a unique Alternate Universe Single Player Story line that starts with the Battle of Endor going wrong...
Galactic conquest is a mod for Battlefield 1942 that wll include gameplay similar to Battlefront (but something to keep in mind is that these guys came first!). A multiplayer mod that will allow players to play on either side of the Galactic Civil War or the Clone Wars and will include many of the famous Star Wars vehicles.