Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...

Onionshare - OnionShare lets you securely and anonymously share a file of any size with someone.

Microsoft OneDrive - Secure access, sharing & file storage

Magic Wormhole - This package provides a library and a command-line tool named wormhole, which makes it possible to...

Nextcloud - With Nextcloud enterprises host their own secure cloud solution for storage, collaboration & communication from any device, anywhere.

FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.