Leaflet – A lightweight JavaScript library for interactive maps

Leaflet is a modern, lightweight open-source JavaScript library for mobile-friendly interactive maps. Weighing just 22kb of gzipped JS code, it still has all the features most developers ever need for online maps, while providing a fast, pleasant user experience.
It is built from the ground up to work efficiently and smoothly on both desktop and mobile platforms like iOS and Android, taking advantage of HTML5 and CSS3 on modern browsers.