Because these are no longer available anywhere else (with Filefront having gone offline and Petroglyph's site all buggered up) I figured I'd upload them for whatever few people might still be interested in modding UAW.
(Copy-Pasted directly from the Filefront page on the tools for lack of anything better to put in the box)
This is the official Mod Tools for the game Universe at War: Earth Assault by Petroglyph games, makers of other such great games such as Empire at War and its expansion Forces of Corruption. If you have used the map editor of EaW then it should be familiar. All credit goes to Petroglyph Games.
I recommend visiting Petroglyphgames.com/forums.
As stated by Petro, "These tools are released "as is" and are unsupported by Sega and Petroglyph Games." However, go to the previous mentioned link, and you will find a friendly community with plenty of unofficial support.