Take control of your files Whether you have the important files burned on a CD or DVD archive, or just about any kind of digital materials that you intend to put for storage or share, you can always check its integrity with FastSum. FastSum is build upon the well proven MD5 checksum algorithm which is used worldwide for checking integrity of the files, and been used for this purpose for at least the last 10 years. FastSum provides you with three interfaces from the console application for technician professionals to modern graphical application for any-level users. The Command-Line Edition comes as a freeware and the Standard Edition starts from $14.95