Don>I'd like to see someone consider using one of the many UI frameworks available these days rather than coming up with another - I guess to try to avoid another guiguts situation. One-man software tools have such obvious shortcomings no matter what their technical merit. Sorry, I'm sure I get what you are suggesting based on looking at these websites, but it seems like you are going beyond requiring volunteers to submit to a "master" source format to now also "master" them when it comes to the choice of tools they are allowed to use to develop books in that "master" source format? I can see how this might work if they were well paid employees, not volunteers. Or are you saying that you are volunteering to make a new set of tools that the volunteers can *choose* to use -- either the tools you provide, or guiguts, or Notepad++ -- or whatever the heck the volunteer wants to use which *they* feel is the most efficient, and/or the most fun, to help them get *their* book effort done?