Open source Screen recorders for Windows

CamStudio

CamStudio is able to record all screen and audio activity on your computer and create industry-standard AVI video files. (GPL)

Windows

Greenshot

Greenshot is a revolutionary screenshot tool optimized for productivity. (GPL)

Windows

ShareX

ShareX is an open source program that lets you take screenshots or screencasts of any selected area with a single key, save them in your clipboard, hard disk or instantly upload them to over 40 different file hosting services. (GPL)

Windows

3 applications