Call Rec is a great program. To the best of my knowledge it is not free; but, it is well worth the 20 bucks. I'm a Detective and I record phone calls with it all the time. It's reliable and easy to use. My only caution is make sure you monitor your memory card, there is no warning for when it gets full and you may not notice. I frequently back the recorded calls up on my computer and delete them from the card. VERY IMPORTANT.... make certain you are completely familiar with the laws in your state, and others you will be calling, regarding the legality of recording calls without consent of the other party.