Sponsorised links
This year
Free Online File Compare Utility
Use to compare one file to another. Will show you a visual representation of the file and highlight the differences.
Similar Page Checker - Duplicate content checker
Your content could be similar to other websites on the Internet, or pages from within your own website could be similar to each other (usually the case with dynamic product catalog pages). This tool allows you to determine the percentage of similarity between two pages.
Sponsorised links
2008
WinMerge
WinMerge is an Open Source (GPL) visual text file differencing and merging tool for Windows. It is highly useful for determing what has changed between project versions, and then merging changes between versions.
2007
Colored Diffs :: Mozilla Add-ons :: Add Features to Mozilla Software
Color diffs sent by SVN/CVS notifications
2006
Axaris Merge
Outil très puissant de comparaison, fusion et synchronisation de fichiers et de dossiers.
Tickets :: [#197] have annotate mode link to line's prior version
I have implemented this feature in another CVS visualizer written in Pike: Code Librarian. Here is the algorithm for reading diffs produced by cvs rdiff, picking out from-line in revision r1 and to-line in revision r2 for every diff chunk between the two
