"TrackChanges is a package for collaboratively editing LaTeX documents. It allows multiple editors to make changes and add annotations to a document. These changes and notes will be color coded by editor and added to the compiled document. The TrackChanges GUI allows the author to quickly find and accept, reject or modify the suggested edits."

This looks like an amazing utility, giving very comprehensive conversion of text from/to a myriad of different formats.

Good introduction to typography using LaTeX, with some gorgeous examples.

At first glance, it looks like a re-invention of the wheel, but it seems to make changing styles much easier.