Identify File (**) by MD5, SHA1 or Others

FileAdvisor: MD-5 or SHA-1 hash of any file
http://fileadvisor.bit9.com/

CastleCops: SHA-1, MD5, and CRC32 hash of file
http://hashes.castlecops.com/

RunScanner: Filename / Process / Guid / CLSID / MD5 hash
http://www.runscanner.net/

Prevx: (need to login)
http://www.prevx.com/

VirusTotal: hash by md5/sha1/sha256
http://www.virustotal.com/zh-tw/buscaHash.html