DupeTrasher 

Here's the deal: you find the faster and more optimized duplicate file finder, and we will give you the DupeTrasher licence for free! DupeTrasher will help you to get rid of the duplicated files from your system, fast & easy.
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HashCalc 

Fast calculator to compute hash, checksum, HMAC values for file, text and hex string. Supports MD2,MD4,MD5, SHA1,SHA2, RIPEMD160,PANAMA,TIGER, CRC32,ADLER32 algorithms and the hash used in eMule/eDonkey(eDonkey2000,ed2k). Good to check/compare files.
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FSUM 

Fast file checksum generation & verification tool. Supports MD2,MD4,MD5, SHA-1,SHA-2, RIPEMD-160,PANAMA,TIGER, CRC-32,ADLER32 algorithms and the hash used in eMule/eDonkey(ed2k). Compatible with md5sum,Easy MD5 Creator,SFV Checker/Verifier,Win CRC32.
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