latexchanges.py (Jan-Ake Larsson): Here's a wrapper I wrote for latexdiff, intended as a drop-in replacement for latex, when you have several numbered (or dated) versions of a manuscript. My coauthors don't as a rule know what CVS or SVN is, they simply use a number or date for the different versions. latexchanges replaces the current DVI with one that includes a latexdiff to the last version. The last version is selected as the TEX file in the same directory with the same prefix (up to a number or a dot), that has an mtime immediately preceding the given TEX file.