I was trying to find an avi to .mp4 converter for mac os x. I did a search on the forums, but it seems like all of the programs that were recommended were for windows. I downloaded Wondershare Video to PSP Converter, which worked - but I haven't purchased the full version for $29 - and as a result the screen says "Evaluation Copy" as a watermark across the center of it. Any good freeware suggestions?

Thanks in advance.