checksum is described as 'Easy-to-use, no-nonsense BLAKE2, SHA1 & MD5 hashing program for Windows, capable of creating & verifying hashes of files and folders, even whole drives, with just one or two clicks. It is robust, lightning fast, intuitive, and completely customizable' and is an app in the file management category. There are more than 50 alternatives to checksum for a variety of platforms, including Windows, Linux, Mac, PortableApps.com and BSD apps. The best checksum alternative is HashCheck Shell Extension, which is both free and Open Source. Other great apps like checksum are OpenHashTab, Robocopy, GtkHash and SuperCopier.