Also known as "Software Made Easy", the TweakPC product line is basically free software that they sell as their own.

They have a really nice but simple web site and they have done a good job with showing boxes (which they don't sell) and screenshots (which don't really match the actual software). Under the guise of being unique software created by them, they have aquired software that is freely available which you don't discover until you have already made the purchase. They keep the software cost low enough to deter people from othering with disputes, as that can be very time-consuming.

The "TweakPC Partition Manager" is actually "Parted Magic", software that is freely available from the author. The author only requests donations.