jQuery - The Write Less, Do More, JavaScript Library.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Zepto.js - Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
qooxdoo - qooxdoo is a universal JavaScript framework that enables you to create applications for a wide...
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.