Alternatives to Fast Sum for all platforms with any license

HashCheck Shell Extension

File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows file-properties dialog box.
- Discontinued Last commit is 2016.
Free Open Source Windows Windows Explorer
Shell integration Windows Explorer extension Add a feature

120 Like
Hashtab

Fast and Simple. Users in over 200 countries have downloaded HashTab to use as a simple MD5 checker or for a more advanced file integrity check.

Free Personal $ $ $ Mac Windows Windows Explorer Finder
Bulk Hashing Shell integration Add a feature

73 Like
HashMyFiles

HashMyFiles is small utility that allows you to calculate the MD5 and SHA1 hashes of one or more files in your system.
- Discontinued The program is no longer updated. Last version, 3.3, released in 2007, can be still downloaded from the official website.
Free Windows
Portable Add a feature

17 Like
CHK Checksum Utility

CHK is an advanced checksum utility — a simple application designed to help you verify the integrity of your files, find duplicates and much more!.

Free Windows
Duplicate File Finder Support for eD2K/eDonkey protocol Portable SHA256 ... SHA512 Add a feature

5 Like
MD5 & SHA Checksum Utility

MD5 & SHA Checksum Utility is a tool that allows you to generate CRC32, MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of single or multiple files. You can also...

Freemium Windows
Drag n drop Windows Explorer integration Add a feature

4 Like
FileVerifier++

FileVerifier++ is a Windows application for verifying the integrity of files. FileVerifier supports various algorithms by means of dynamically loadable hash libraries....
- Discontinued The project is no longer developed. Last version, 0.6.3.5830, released in May 2010, can be still downloaded from SourceForge.
Free Open Source Windows
Drag n drop Portable Shell integration Add a feature

10 Like
Hash Generator and Validation Tool

It supports many types of hashes, including CRC (any), HAVAL, MD5, MD6, SHA-2, SHA-3, Tiger, Whirlpool, etc.

Free Open Source Windows Linux
No features added Add a feature

3 Like
dsSHA

dsSHA is a SHA1 hash-calculator. The beauty of this is its simplicity, tiny size (7KB) and ease of use. There is no interface: just drag and drop a file on to this...
- Discontinued The program is no longer updated. Last version, 1.0.2, released in 2004, can be still downloaded from the official website.
Free Windows
Portable Add a feature

1 Like
dsMD5

dsMD5 is a MD5 hash-calculator. The beauty of this is its simplicity, tiny size (6KB) and ease of use. There is no interface: just drag and drop a file on to this...
- Discontinued The program is no longer updated. Last version, 1.0.2, released in 2004, can be still downloaded from the official website.
Free Windows
Drag n drop Portable Add a feature

1 Like