SyncTrayzor is a tiny Open Source tray utility for Syncthing on Windows.

SyncTrayzor is designed to host and wrap Syncthing, making it behave more like a native Windows application and less like a command-line utility with a web browser interface.

SyncTrayzor Features:

Has a built-in web browser, so you don't need to fire up an external browser.
Optionally starts on login, so you don't need to set up Syncthing as a service.
Has drop-box style file download / progress window
Tray icon indicates when synchronization is occurring.
Alerts you when:
You have file conflicts
One of your folders is out of sync
Folders finish syncing
Devices connect / disconnect
Has a tool to help you resolve file conflicts
Can pause devices on metered networks, to stop Syncthing transferring data on a mobile connection or wifi hotspot for example
Contains translations for many languages