Ninite - Ninite is the easiest way to install software.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Chocolatey - The sane way to manage software on Windows.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Just Install - just-install - The stupid package installer for Windows.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.