Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

DiffEngineX - DiffEngineX is a fast utility that finds the differences between the formulae, constants, defined...

Shutter - Shutter is a feature-rich screenshot program.

Synkronizer - How to compare two excel files with Synkronizer: the leading excel comparison and merging tool in the market. Download and try for free.

MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.

PerfectXL Compare - This is a tool developed by a small team in the Netherlands. It's a standalone application that generates a simple, concise, easy to understand overview of the differences between 2 Excel sheets. It can also handle even the most complex Excel files.