It sounds like what you're looking for is a version control system (VCS) for rich text documents, whereas most are made for program source code. I built pretty

It sounds like what you're looking for is a version control system (VCS) for rich text documents, whereas most are made for program source code. I built pretty much the exact application you're describing, but it was for the company I work for as an internal project only. (And not very pretty either) If you had some specific ideas, I'm always looking for project to work on. Feel free to send them to me (blazes816@yahoo.com). I doubt I'd personally get much done on it, but I tend to get into things and go nuts sometimes. At the very least, you may get some workable code or ideas to go about it.