does it record sound?

i need a free program that will record from the mic in jack on the back of my laptop.(the only way to record on to a computer, i just wanted to be clear and notmake u think that i was talkin about recording songs from cds or somethin) ANYways , i just need a recording program that records for unlimited time, unlike the stupid windows recorder!! not that yall care, but what me and my friend are doin is hookin his elctric guitar up to the mic in with a connector piece, then using one of those cord tapes that usally come with cd players and putin the sound out to his stereo , but i only have a 1 week trial program and i need somethin soon. i have been online for hours lookin for somethin, but i can find a thing!!!!!!! god help me... later