This plugin is to help you to create seamless patterns or game tiles and so on. Everything you paint into image is copied periodically over the rest of image.
If you are interested, here is small introductory video: http://repeated-painter-gimp-plugin.googlecode.com/files/repeatedPaintin..., though principle of its work is very simple...
More information can be found here: http://code.google.com/p/repeated-painter-gimp-plugin/wiki/Introduction
It is trivial to compile under linus (see Readme file) and windows binaries might be found here:http://gimpchat.com/viewtopic.php?f=9&t=7067
When installed, it can be found as Filsters/ Artistic/ Periodic Painter
- GIMP Version: