Bart Crouch has written a cool new blender add-on, Texture Paint Plus.
Texture Paint Plus (TPP for short) is an add-on to improve the texture paint workflow in Blender. The script is based on ideas by Julio Iglesias Lopez.
- Draw straight lines
- Replace images textures with UV grids
- Easy access popup
- Consolidate images!
- Several speed hotkeys
The Texture Paint Plus page contains instructions, a breakdown of the add-on, a demo video and download links.
There is also a discussion thread at Blenderartists.org.