ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Kap - Kap is an open-source screen recorder built with web technology.
Thum.io - A real-time website screenshot generator
Picmaker - Design the Future
Studio1 - Automate your screencast videos for customer support.
ScreenTray - A better way to capture, annotate and share screenshots