Beyond Compare - Beyond Compare allows you to compare files and folders.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.