HashMyFiles

If you're downloading files, then you know that sometimes corrupt transfers can totally ruin your day, especially if they are large files. Using a hash tool can help you make sure that the files got through okay. That's where HashMyFiles comes in. This freeware tool from Nirsoft basically can generate the MD5 or SHA-1 hashes that you need to make sure that it's consistent before and after the transfer. This application works for anything from Windows 2000 to Vista.