GDHasher is a simple shell extension to calculate and check file hashes, installs itself as a right-click menu shell extension, and allows computation and verification of MD5, SHA-1 and SHA-256 hashes.
The app is written in C++, with ATL, WTL and some STL and Boost. Quickly calculate and verify file hashes using GDHasher.

The license of this software is Freeware, you can free download and free use this file compare software.