Trakkit is a frontend for visualizing boat tracks generated by a GPS device. I initially designed it for my own needs, specifically for live tracking of sailboats using Iridium GO. It now operates with any system capable of sending timed emails containing GPS positions. Additionally, Trakkit supports GPX or NMEA file uploads from apps like Navionics Boat, QtVlm, OpenCPN, etc...
Trakkit is built upon a tracking engine and incorporates various other products, whether open source or proprietary, such as Leaflet or OpenStreetMap.
Trakkit is a free, non-commercial service. It is not designed to be bulletproof or offer an abundance of services, but simply to allow you to share your live position and keep traces of your voyages with your boat.