Good Free Onscreen Recorder?

The best one I've come across is Screencast-o-Matic. The free version allows up to 15 minutes of recording, but the only downsides is that there's a watermark in the corner and a watermark around your mouse whenever you click. It's definitely worth a try, though.

TechSmith Camtasia Studio is a free tool. It can helps users capture screen with online videos, powerpoint, multichannel audio, and webcam videos to create tutorial videos and presentations. Videos are exported in different formats with high audio and image quality. Users can select to record the videos with optional size.

Microsoft Windows Vista, Windows 7, or Windows 8

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Fraps is able to record your entire game playing process as well as take screenshots. The program can analyze and display frames per second (FPS). The program is written based on DirectX and OpenGL technologies and is the best program for gamers. The program can automatically split a video if its size exceeds 4GB. You can select several sounds for taking screenshots in the available list of applications.

http://betdownload.com/fraps-1147-download