Resilio Sync

Syncthing is an open source peer-to-peer file synchronisation tool

Powerful file hosting script with support for Amazon S3, Wasabi, Backblaze, local, direct and SFTP...

File management and sharing system, supports multiple storage providers

File hosting and sharing solution primary for teams and organizations

Unison is a file-synchronization tool for OSX, Unix, and Windows

File Sharing and Collaboration Platform