JavaScript API Usage Limits | Google Maps Javascript API | Google Developers
hpneo/gmaps · GitHub
gmaps.js allows you to use the potential of Google Maps in a simple way.
gmaps.js — Google Maps API with less pain and more fun
shawnwildermuth/travelMap · GitHub
This project extends the GMaps project and allow a building of map that shows a travel map.
Wilder Minds World Tour
Gmaps.js the easiest way to use Google Maps | Hacker News
OpenLayers 3 - Welcome
"A high-performance, feature-packed library for all your mapping needs."
Google Maps or Bing Maps are one of the possible layers.