It’s a plugin that allows you to quickly paint the faces of parts with textures. It comes with a UI that previews the textures’ appearance and that contains buttons for setting a texture, getting the set texture and switching from painting to erasing textures. The UI updates as you modify the texture, too.
Images:
(I used the plugin to paint the walls)
(To paint the checkers)
(And to erase them)
Feedback?