Diff And Patch

Diff Tools

Diff tools can be extremely useful when working on large projects, especially when sharing code between several programmers without the aid of a revision control system such as CVS or Perforce. These tools make it possible to track changes betwen two different versions of a mod, and are even capable of seamlessly merging two different mods.

Yet another use is to examine changes on the SDK tree after a update, in addition to reading the changelog.

Alienbrain

• A groupware framework for game developing, includes a good diff tool.
• AlienBrain

Beyond Compare

• An excellent text comparison tool.
• Scooter Software

Cygwin

• A POSIX layer for Windows which includes many popular GNU tools such as GCC (GNU Compiler Collection), GNU Patch, etc.
• Cygwin

Meld

• Meld is a visual diff and merge tool. It integrates especially well with CVS. The diff viewer lets you edit files in place (diffs update dynamically), and a middle column shows detailed changes and allows merges. Gnome app.
• Meld

Winmerge

• A Windows tool for examining differences between two set of files.
• Winmerge

DiffMerge Free (best)

• DiffMerge is an application to visually compare and merge files for Windows, Mac OS X and Linux.
• Visual folder diff (inspect sourcecode diff very fast on new releases)
• DiffMerge Download

You can read more about how diff software works here:

• Diff Utils