oCam is a free software that allows you to easily record your computer screen or audio. It's the ideal software for recording live video, streaming online games, radios or anything else that passes through your computer screen or sound card.
It allows selecting the capture area by dragging the mouse, adding a watermark to the videos, in addition to several other features that work with a single mouse click.
You can save in many different formats such as MP4, MKV, MV4, MOV, WMV, FLV, AVI, TS and VOB. It has a simple and intuitive interface. It's free for personal use.