If you do development work, often times it is beneficial to compare the difference between new and old source files to see the changes made. While you could do a visual inspection of each or use the ‘FC’ command line tool, a much faster and more helpful way is with WinMerge.

WinMerge allows you compare difference between files and then easily merge them together. WinMerge offers lots of features such as regular expression searches and archive file support, but the biggest benefit is the most obvious one of being able to visually inspect differences using colorations.

WinMerge is completely free and is a great tool for developers (or anyone who deals with lots of text files) to have around.