XvT: Bop shipset from reading more of a What If storyline sounds interesting will have to download this one myself and try it out.

Troys Editors - Probably the best guy to make mission editors he makes the best from all of them that I have seen and used, very user friendly.

Campaign Creation Site - Tells you how to make opts, Missions, Cutscenes, Has some opts to download, missions for BOP.

DarkSaber's this guy has it all :)