Free drm remover for music?

i have had ipod and itunes for the past 9 years and i have 5GB of music all downloaded from itunes but i just got a zune for my birthday after my ipod broke, i need a drm remuval prorgam that is free so i can use all my music on my ipod, it needs to be free becasue im to cheep to buy cds to burn the music. thanks