Code Compare is a free compare tool designed to compare and merge differing files and folders. Code Compare integrates with all popular source control systems: TFS, SVN, Git, Mercurial, and Perforce. Code Compare is shipped both as a standalone file diff tool and a Visual Studio extension.
AptDiff - AptDiff is a visual text / binary files comparison and merging utility for Windows.
Beyond Compare - Beyond Compare allows you to compare files and folders.
WinDiff - Download Windiff : free files and folders comparison tool
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
CompareMerge - CompareMerge is a software tool for file comparison and merging text-like files. It is useful for determining what has changed between versions, and then merging changes between...
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.