CodeCompare is a useful developer's tool for comparing the content of different files, similar to DIFF in Linux. A review of CodeCompare has also been published.
Download CodeCompare 2.70 (from Programming Tools)
3 way merge, code comparison, code merging, visual studio, code comparing9.75 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free