ChartPlotter is part of DSTK 3 at: https://sourceforge.net/projects/dstk3/?source=directory
DSTK Engine is open source there. Chart Plotter helps to interface with Plotly JS and generate and create charts and dashboards with some mouse clicks.
This OpenCPN plugin send current position and waypoint to GPSBridge Android application. GPSBridge act as a GPS and send location to others android apps like Google Maps, Navionics chartplotter, etc...