VRR-Infoscreen shows the next departures at a public transit stop, just like the Lumino LED displays used in some places. It also supports an app / infoscreen-like frontend and JSON export.
It works best for the VRR (Verkehrsverbund Rhein-Ruhr), but also supports many other german transit networks. All data is provided without warranty of any kind.
¹ separate values with commas, e.g. NE,U,10