WinDiff is described as 'Graphical file-comparison program published by Microsoft (from 1992[1]), and is distributed with certain versions of Microsoft Visual Studio as well as in source-code form with the Platform SDK code samples' and is a Diff Tool in the development category. There are more than 25 alternatives to WinDiff for a variety of platforms, including Windows, Linux, Mac, Web-based and PortableApps.com apps. The best WinDiff alternative is WinMerge, which is both free and Open Source. Other great apps like WinDiff are Beyond Compare, Diffchecker, SemanticDiff and Compare.
dwdiff is a diff program that operates at the word level instead of the line level. It is different from wdiff in that it allows the user to specify what should be considered whitespace, and in that it takes an optional list of characters that should be considered delimiters.
Online Text compare is a browser based data compare tool that highlights the differences between two versions.
