Digionica SyncTool - Digionica SyncTool is a useful utility that has been designed for synchronizing files and folders in numerous computers on the net, on local storage, and on servers.
Outlook Google Calendar Sync - Offers calendar synchronisation between Outlook and Google, including attendees and reminders.
Truck - A faster alternative to FTP
gSyncit - gSyncit Outlook Cloud Synchronizer. Outlook Calendar, Contact, Task, Note Synchronizer supporting Google, Toodledo, Evernote, Informant, iCloud, AOL, Yahoo, Synology, Fruux, Memotoo and CalDav/CardDav services.
MirrorFolder - MirrorFolder is a real-time folder synchronization and backup software
EteSync - Secure, end-to-end encrypted and journaled personal information synchronization.