I'm the author of the tool "MapScale 2.0", which you have already listed on your "list of essential tools for Unreal/UT scripting/mapping". Quite a while ago, I have created another useful tool for one of my mapping projects. Someone recently reminded me that it might be useful to officially release it and post a lik to it here. So that's what I'm doing now

The primary problem addressed by UnrealPolyEd is the missing brush editing functionality in the classical UnrealEd. This makes it particularly difficult to create somewhat realistic outdoor environments for "classical" Unreal, such as terrains. UnrealPolyEd solves this problem by providing a brush editor that is based on polygons with export functionality to *.t3d to allow importing the respective brush into UnrealEd.
The tool can be downloaded on my website:
Download: http://sidewinder.de.vu/unrealpolyed
I'd appreciate if you would add it to the list of essential tools if you think it's worth it.
Please direct any feature requests or bug reports to me via e-mail to [email protected].
Here's a screenshot of the tool:
