Bukkit plugin for maintaining borders for your worlds to limit their sizes, as well as generating missing chunks or trimming excess chunks.
This plugin is no longer being supported. Sorry, I just don't have the time or interest for it at this point. People are welcome to make their own forks of the project and continue it. The source is under the extremely permissive BSD license and as long as you maintain a link back to the original project somewhere (even in a text file somewhere in the project), you're welcome to do what you like with it.