FastCopy - FastCopy is the fastest copy, delete, & sync software on Windows.
Beyond Compare - Beyond Compare allows you to compare files and folders.
RoboCopy - Robocopy is a free file copy tool that is included with the Microsoft Windows operating system. It allows one to construct complicated instructions to move, or copy files.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Ultracopier - SuperCopier replaces Windows explorer file copy and adds many features: Transfer resuming, transfer...
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.