Google Street View - With Street View you can explore the world at street level.
GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
GeoGuessr - GeoGuessr is a new way to explore the world in a gaming style.
VisualGPSView - VisualGPSView incorporates many advanced features found in professional programs.
OpenStreetCam - OpenStreetCam that was also known as OpenStreetView, is a service dedicated to offering the real images of the most of the locations of the world.
RTKLIB - An Open Source Program Package for GNSS Positioning