Free Adobe Photoshop alternative
License: GNU General Public License v3.0
Microsoft PowerToys is a set of utilities which are usefull for power users.
License Type: MIT
Some of the functions offered by PowerToys which could be usefull:
Allows you to force an application to always be shown in the foreground, even when the focus changes to another windows.
Tool which can be used to quickly figure out what color is used for a specific pixel on the screen.
This is a window manager which I personally use alot as I sometimes feel limited to the number of snap points which are available in Windows by default.
Useful tool to bulk resize images.
Works like Snipping Tool, but copies the text out of the selected region using OCR and puts it on the clipboard.