The MD5 Hash generator http://lib.giveawayoftheday.com/MD5_Hash_Generator_164802/ allow you to generate 128-bit MD5 hashes for your files, allowing you to check for corruption during downloads, or to generate the MD5's for distributing with your software. Main Features: - Drag and Drop functionality - Right-clicking on any file shows "Generate MD5 hash" option - Can generate a .md5 file next to the target file, as often found on many webservers. - NEW to V1.2 - Can now batch process files, just drag and drop multiple files to the window and .md5 files will generated for them all! - NEW to V1.3 - Can generate FastSum compatable md5 files.
WinMD5Free http://lib.giveawayoftheday.com/MD5_For_Win32_10123/ is a tiny and fast utility to compute MD5 hash value for files. It works with Microsoft Windows 98, Me, 2000, XP, 2003, Vista and Windows 7.As an Internet standard (RFC 1321), MD5 has been used in a wide variety of security applications, and is also commonly used to check the integrity of file, and verify download. WinMD5 is a small and easy tool to calculate md5 hash or checksum for different files (including files larger than 4 GB).
PHP md5() Function http://www.w3schools.com/php/func_string_md5.asp