DoubleTwist is a multifunctionprogram. It can perform search on the net and make purchases, download music from Amazon, search music on a library which has more than 9 million songs and much more. It also allows you to play back any video file and transfer them to your Blackberry, Palm Pre, PSP, or any portable device. In brief, DoubleTwist helps you to manage your multi-media library, permits you to download videos from internet, view them, and convert them free of charge for your portabledevices. It is a freeware and compatible with Windows Windows 7/Vista/XP.