WinMerge
Open SourceWinMerge is an open-source differencing and merging tool for Windows. It helps you compare, synchronize, and merge both files and folders, highlighting differences visually and providing robust tools for handling conflicts.
                  
                    
                  
                  Key Features
                
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                      Free and Open Source
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                      Effective Visual File and Folder Comparison
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                      Robust Merging Capabilities including 3-Way Merge