FastCopy - FastCopy is the fastest copy, delete, & sync software on Windows.
Dropbox - Online Sync and File Sharing
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.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Ultracopier - SuperCopier replaces Windows explorer file copy and adds many features: Transfer resuming, transfer...
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.