Hi all, some of the blizzard guys said this was a good place to find modders. We recently added support for blizzard engine tangent space output to our freeware tool handplane. The TL:DR for handplane is no more shading errors when baking normal maps. We have an active support thread on polycount and if you have issues I can be reached directly by email.
Support thread: http://www.polycount.com/forum/showthread.php?t=116899 Email: alecmoody @ gmail.com
You can download the latest build at: http://www.handplane3d.com/handplane_v1_5.rar