FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
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.
Unison - UNISON is one of the UK's largest trade unions, with 1. 3 million members. We represent staff who provide public services in the public and private sector.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
BestSync - BestSync is a utility for following solutions: