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Beyond Compare - Beyond Compare allows you to compare files and folders.
Content Compare by DeltaXML - Content Compare is the #1 comparison solution for specified XML grammars. Simplify your workflow and detect differences quickly and accurately with DeltaXML’s Content Compare. Find changes between XML content, ensuring error-free XML comparison.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Araxis Merge - Home of the award-winning Araxis Merge two and three-way file comparison (diff) and merging application, Araxis Find Duplicate Files, Araxis Replace In Files, and the Araxis Ketura issue tracking, project scheduling and time tracking application.
Tkdiff - tkdiff is a graphical diff viewer based on the Tk framework.
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.