GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
csync - csync is a lightweight utility to synchronize files between two directories on a system or between...
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
Synchromat - Synchromat is file and folder synchronization software for Windows.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
CopyQueue - CopyQueue - Copying under control.