wma to mp3?

anyone knows a good program to convert wma files to mp3? nothing to complicated, just with an option to reduce the song size/bit rate(?)
thanks in advance

>>7
I'm not sure if you can download the songs for free. I go to penn state and it's included in our technology fee since the don't want to get sued by the RIAA for anything illegal that's done on campus. But with the full version you can download .wma files that stop working after the sememster's over.