kdiff3
Beyond Compare
WinMerge
Meld
DiffMerge
Araxis Merge
P4Merge
Devart Code Compare
Camouflage
Pliim
Declutter
CleanSpark
Desktopr
InfiniDesk
Desktop Curtain
Hourglass
kdiff3
CamouflageBeyond Compare - Beyond Compare allows you to compare files and folders.
Pliim - One click and be ready to go up on stage and present!
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Declutter - Cleans and organises your files in Mac desktop automatically
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
CleanSpark - Declutter your screen to share it on your next presentation