HashCheck 2.4.0

HashCheck

The HashCheck Shell Extension makes it easy for anyone to calculate and verify checksums and hashes from Windows Explorer. In addition to integrating file checksumming functionality into Windows, HashCheck can also create and verify SFV files (and other forms of checksum files, such as .md5 files). It is fast and efficient, with a very light disk and memory footprint, and it is open-source; originally from code.kliu.org

Changelog:

added SHA3-256 and SHA3-512 support (via the Keccak Code Package)
new option to select which hashes to calculate & display in the file properties sheet (MD5 and SHA3 are disabled by default)
Checksum file creation & verification are now multithreaded on solid state drives (Windows 7+ only)
all release binaries starting with this version will be digitally signed, and will display "Open Source Developer, Christopher Gurnee" as the verified publisher
safety/consistency improvements:
never saves a partial Checksum file—it's either completed or it's deleted
better visibility of file read errors during Checksum file creation
installer/uninstaller updates (primarily for Windows 10)
automatic CI builds on Appveyor thanks to @Chocobo1
initial unit tests (including Appveyor support) for Checksum verification (based on NIST test vectors) and the file properties sheet
updated Catalan translation thanks to @Hiro5
updated Traditional Chinese translation thanks to @Chocobo1
updated Italian translation thanks to @scara
many other minor fixes, speed improvements, and GUI updates