ZSKSoft Synchronizer 

Intellectual folder synchronizer; monitors actual changes. Efficient: supports regular folders, laptop, remote computer, FTP, etc. Clearly displays changes, their gravity, and the actions plan.
folder directory folders directories synchronization sync synchronizing comparison laptop remote site publishing project

CloneMaster 

Find TRUE duplicate files (byte for byte). Clean your hard drive of duplicate files that are just wasting space. It searches for TRUE duplicate files (byte for byte), same name files and zero length files and bring them to your attention.
duplicate files finder remove dup dups clone cd clean find delete master file hard

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.
hash message digest checksum crc file data sum 128 bit check checking checker verify

ComparatorPro 

ComparatorPro will finds, deletes and copies over duplicate files, it will also find missing files and perform full backup routines. It can easily sync the files to ensure a perfect match. And here, too, is an alternative to the Microsoft Briefcase.
compare duplicate file finder backup back up remove dup missing clone find delete

Comparator 

Comparator will finds, deletes and copies over duplicate files, it will also find missing files and perform full backup routines. It can easily sync the files to ensure a perfect match. And here, too, is an alternative to the Microsoft Briefcase.
compare duplicate file finder backup back up remove dup missing clone find delete