CamStudio - record screen

CamStudio is able to record all screen and audio activity on your computer and create industry-standard AVI video files and using its built-in SWF Producer can turn those AVIs into lean, mean, bandwidth-friendly Streaming Flash videos (SWFs).

Website: http://camstudio.org/

Notice to running on Windows 8 (Release Preview)-

Installed and tested CamStudio 2.6b r294 on Windows 8 Release Preview, the following error is reported:

The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace tool for more detail.

Solution:
Download and install Microsoft Visual C++ 2008 SP1 Redistributable Package (x86): http://www.microsoft.com/download/en/details.aspx?id=5582