Github has a lot of 'awesome lists'. Here's mine. Well not yet, it's kind of a mess actually right now...
ZoomIt - Presenting something at work but people can't read something? Zoom in with ZoomIt. Also supports drawing and more.
ShareX - Screen capture software. Regions, video, gifs. Very customizable.
FARR - A launcher that is very cutomizable. Does not index files, uses heuristics
AutoHotkey - "The ultimate automation scripting language for Windows."
ERD Plus - Need to mock up a simple entity relationship diagram quickly?
Draw IO - Don't have Visio? Would it be overkill if you had it? Just don't like Visio? Check out draw.io
Desktop Coral - "program designed to "reserve" some portion of your desktop which is shielded from maximized applications"
video-2-mp3 - Easily get the audio from an MP3 if you'd rather not ffmpeg
US States - Sometimes you just need a clean list of the 50 states.