HashCheck Shell Extension is described as 'File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows file-properties dialog box' and is a very popular app in the os & utilities category. There are more than 50 alternatives to HashCheck Shell Extension for a variety of platforms, including Windows, Linux, Mac, BSD and PortableApps.com apps. The best HashCheck Shell Extension alternative is OpenHashTab, which is both free and Open Source. Other great apps like HashCheck Shell Extension are GtkHash, HashTools, RapidCRC Unicode and HashMyFiles.
It has more algorithms, VirusTotal check for virus and when you open an checksum file you can resize the window.