AptDiff a simple to use yet powerful tool that will fit into all your visual text/binary files comparison and merging needs.
    The perfect tool that comes in a free to use package is enhanced with the capabilities to make visual text/binary files comparison and merging even simpler. Even though being small and compact this tool caters all the functionalities of an efficient files comparison and merging utility. This tool is supported with features like; the tool can compare directly for Windows Explorer, easily navigates through differences, can automatically detect file changes, supports customizable keyboard shortcuts, the pane splitter is adjustable with smooth and synchronized scrolling, supports command line, allows adding shell menu items, supports a multilingual interface, and much more.
    This must have tool is extensively configurable as per the tastes and preferences of the user and is compatible with Windows 2000/XP/2003 and Vista.