This extension for Icedove and Iceape can color diffs sent by SVN/CVS notificators and it can show them in side-by-side mode. Also it converts all the filenames in the message log into links so you can quickly jump to the file you want to review and it can make space and tabs chars visible.
The supported formats are:
* Generic SVN mailer format
* git mailer format
* Generic CVS format
* Context CVS format
* Unified patch