GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
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.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Allway Sync - Free File Synchronization, Backup, Data Replication, PC Sync Software, Freeware, File Sync, Data Synchronization Software | Allway Sync – File Synchronization That Works . DownloadAllway Sync – Free Software Downloads, Free File .
DirSync Pro - DirSync Pro: Powerfull synchronization and backup utility. It's portable, easy to use, open source, 100% free, 100% spyware-free, no limitations
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.