OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Dxtory - Tool to display FPS in video games, make screenshots, record videos.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
ConnectWise Control - ConnectWise Control is a mobile app that allows you to instantly connect with another system from anywhere with a connection to the internet. The software not only comes in a mobile app, but it has a desktop version as well for complete coverage.
MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.
Droplr - Droplr is a tiny application that aims at helping people share things easier.