Free screencasting software

media player, streaming client, streaming media server, and audio and video converter (transcoder), free/libre and open-source cross-platform software

VirtualDub is a free and open-source video capture and video processing utility for Microsoft Windows written by Avery Lee. It is designed to process linear video streams, including filtering and recompression. It uses AVI container format to store captured video. The first version of VirtualDub, written for Windows 95, to be released on SourceForge was uploaded on August 20, 2000.

ShareX is a free and open-source screenshot and screencast software for Windows. It is published under the GNU General Public License. The project's source code is hosted on GitHub. It is also available on the Microsoft Store and Steam.

CamStudio is an open-source screencasting program for Microsoft Windows released as free software. The software renders videos in an AVI format. It can also convert these AVIs into Flash Video format, embedded in SWF files. CamStudio is written in C++, but CamStudio 3 will be developed in C#. The program has distributed malware and harmful viruses via the installer.

recordMyDesktop is a free and open source desktop screencasting software application written for Linux.

SimpleScreenRecorder is a Qt-based free and open source multithreaded screencast software made for Linux and Unix-like operating systems which can handle similar tasks FFmpeg/avconv and VLC does.