Overview:

Leaflet is the leading open-source Javascript Library for mobile friendly interactive maps. It is simple, easy to use, efficient and has a great performance on desktop and mobile platforms. It has all the mapping features most developers ever need.

Features:

1. Layers Out of the Box

• Tile layers
• Markers, Popups
• Vector Layers: Polygons, Polylines, Rectangles, Circles etc.
• Image Overlays
• GeoJSON: It is an open standard format designed for representing simple geographical features, along with their non-spatial attributes.

2. Interaction Features

• Scroll Wheel Zoom 
• Pinch Zoom on mobile
• Double Click Zoom 
• Zoom to Area(shift-drag)
• Keyboard Navigation
• Events(click, mouseover etc.)
• Marker Dragging

3. Visual Features

• Zoom and pan animation: background stays in plays and key element slowly lift and move to create depth and motion from static image.
• Tile and popup fade animation:  to bring items into a view or to take items out of a view.
• Retina resolution support: better quality displays

4. Performance Feature

• Hardware acceleration on mobile: It makes it feel as smooth as native apps.
• Utilizing CSS3 features: to make panning and zooming really smooth.
• Smart polyline/polygon rendering with dynamic clipping and simplification makes it very fast.
• Modular build system for leaving out features you don’t need.

5. Map Control

• Zoom buttons
• Attribution
• Layer switcher
• Scale

6. Browser Support

a. Desktop

• Chrome
• Firefox
• Safari 5+
• Opera 12+
• IE 7–11

b. Mobile

• Safari for iOS 7+
• Android browser 2.2+, 3.1+, 4+
• Chrome for mobile
• Firefox for mobile
• IE10+ for Win8 devices