Happy to present you SpriteUV](http://www.spriteuv.com) concave mesh generator and packer.
Some key features:
- Extremely tight. Additional 30%-60% texture free space compare to square or other concave packing algorithms
- Concave mesh from sprite
- Per sprite adjustments
Export to OBJ or COLLADA. Ready to use in any 3d application
and in UnrealEngine via Collada to FBX converter](http://usa.autodesk.com/adsk/servlet/pc/item?iteID=123112&id=20481519)
- Free version is available
*Characters created by amazing artist Little Druid](http://drawcrowd.com/quiqer26b6)
triangle count 247
To download and for more information please visit www.spriteuv.com.