1. How to check MD5 hash and create checksum file in Windows and Linux?

... a MD5 hash (checksum) then you can compare the hash of the downloaded file with the hash provided by file owner. So you will know if you have downloaded the exact copy of the file without any error. ...

2. HashCheck Shell Extension

Open Source checksum/hash creator and verifier for Windows (shell extension). It supports .sfv, .md4, .md5 and .sha1 file extensions. I use it and I am satisfied with it. Visit HashCheck!  ...

3. FreeCommander

...  Copy, move, delete, rename files and folders Wipe files Create and verify MD5 checksums File splitting File properties and context menu Calculation of folder size Folder comparison / synchronization ...