What is the best screen recorder for minecraft?

Hi

I want to know what screen recorder is best for minecraft. It must be FREE and doesn't cause any lag. Also it can't have a watermark and can have a time limit but 15mins or over.
Don't say fraps because that is the worst.

Lewis

http://www.dvdvideosoft.com/products/dvd/Free-Screen-Video-Recorder.htm#.UyHtxia9KSM
Is a great free recorder.
However you could pick any screen recorder and crack it.

DENNIS