GoodSync
Siber Systems Inc
Autosync for Google Drive
MetaCtrl
SugarSync
SugarSync, Inc.
OneSync: Autosync for OneDrive
Dropsync: Autosync for Dropbox
Sync - Secure cloud storage
Sync.com Inc.
Autosync - File Sync & Backup
Syncthing
Syncthing Community
Microsoft OneDrive
Microsoft Corporation