

Specifically for Syncthing, there’s Syncthing Tray. It’ll put a little icon on your icon tray (or since you’re on KDE you can use the Plasmoid and put it wherever you want) and you can configure it to change colors depending on the status of Syncthing, send notifications when it finishes a sync or can’t connect, see a detailed view of the sync status and the folders, etc.
It’s very customizable, I’ve been using it for a while. Check it out!
If only…