Cesium – Flexible Mapping Engine With WebGL
Cesium is a WebGL-powered JavaScript mapping library like Google Maps or Bing Maps and they provide APIs for integration.
Maplace.js – A JavaScript Helper For Google Maps
Maplace.js is a jQuery plugin that simplifies integrating Google Maps into websites. It works with the latest Google Maps API (v3) and has methods for adding markers + custom content and drawing paths, polygons or routes.
Faster Google Maps using GMaps.js
GMaps.js is a feature-rich jQuery plugin, helps consuming Google Maps much easier.
Leaflet – JS Library For Interactive Maps
A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by CloudMade
