CooolSoft Products :

Power Screen Recorder (freeware)

Record your desktop to avi or flv format video directly.

Freeware forever.
Free adjustment to record region anytime, you can do it before or after recording start, it can even be zoomed in or out.
High record quality by using latest video codec technology and two-pass encoding method.
Annotation mode supported, you can annotate to your desktop anytime, it's a very useful feature for making teaching video.
Watermark supported, you can make completely customized watermark easily.
Low cpu usage, by using late-encoding technology, the record will not affect any of your current work.