which recorder program is the best and free and dont have any thing types in the screen like fraps or hypercam3 and it dont effect in the game speed while recording?

well i ment the best recorder to record a vid,i see alot of "unregistered hypercam 3" "unregistered camstudio 3.0" "www.fraps.com" top of the screen,i want a recorder and it dont show anything

tried cam studio but it sucks in my pc,really quitly bad,bad speed at recording,needs key :L