1. WinMerge is an open source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.
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  2. FileMerge lets you compare one file to another or one directory to another and merge the files or directories together.
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  3. P4Merge uses color coding to allow users to visualize the differences between file or images. It allows three-way merging among files, and shows side-by-side file/image comparison.
  4. DiffMerge is a graphical file comparison program for Windows, Mac OS X and Unix, published by SourceGear. * Integrates with Windows Explorer; adds a shortcut to the context menu. * Compatible with different character encodings, including Unicode support.

    Discontinued

    The program is no longer updated. Last version, 4.2.0, released in October 2013, can be still downloaded from the official website

  5. SmartSynchronize is a multi-platform file and directory compare tool. It allows you to compare files or perform 3-way-merges, both with the ability to edit the file contents.
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  6. SemanticMerge - The diff and merge tool that understands C#, Vb.net, Java and now C
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  7. EMerger Free V1.0 is a Windows application that can help you merge or combine multiple excel files into a single excel file or CSV file. With this application, You can save more time on merging excel files due to its fast processing speed. Making your work faster.
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  8. Code Compare is a free file and folder merge tool from Devart.
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  9. Split and merge multiple text or binary files in either character, line, or byte modes. When splitting files, you can split on certain text or binary separator; target given number of parts; or target specific part size. Join files on lines/bytes.
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  10. SplitFiles goal is to split (chop) big file in smaller segments to be able to store them in floppy disks or CDs (these are just examples, the target size is fully customizable).
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  11. DiffFork is a diff tool for Mac OS X. DiffFork can compare both folders and files, presenting differences in a visual format. * Block Guide and Scrolling in Sync. * Differences with Background Colors. * Visual Feedback. * Edit in Place. * Encoding Detection. * Word wrap

    Discontinued

    The program is no longer updated. Last version, 1.1.9.2, released in 2012, can be still downloaded from the official website.

  12. Split a file or Concat a group of files by dragging a file on the program icon (in the Dock) or by clicking a button above.
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  13. A GUI/Console program to hash text or file, and more.
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  14. NoVirusThanks File Splitter & Joiner is a handy freeware application which allows you to easily and quickly split or merge files.
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  15. Easily compare and merge text files; compare doc, xls and pdf files; prepare comparison reports and printouts.

    Discontinued

    The program is no longer updated, but last version, 4.2, released in November 2010, can be still bought from the official website and it's reportedly still working.