1)   4TOPS Compare Excel Files 1.1 4TOPS Compare Excel Files is an easy to use program that clearly reports where and what the differences between two Excel workbooks are.   2)   Snapper 3.0.21 Snapper reads the directory of a disk which is then saved as a "snapshot", so that later you can compare it with a new snapshot of the disk and see what has changed. The results are easy to see with colour highlighting in an Explorer-style interface.