LeafletJS:免費開源JS互動地圖是由simplicity, performance and usability基於JavaScript library開發的支援手機應用的互動地圖，免費開源，使用者可以自由下載使用。

LeafletJS的體積只有28KB，操作簡單、效能優越、可用性極強，主要支援桌面和移動平臺使用，支援HTML5和CSS3，支援API接入，幫助設計師開發提高工作效率。

Leaflet is a modern open-source JavaScript library for mobile-friendly interactive maps. It is developed by Vladimir Agafonkin with a team of dedicated contributors. Weighing just about 28 KB of JS code, it has all the features most developers ever need for online maps.

Leaflet is designed with simplicity, performance and usability in mind. It works efficiently across all major desktop and mobile platforms out of the box, taking advantage of HTML5 and CSS3 on modern browsers while still being accessible on older ones. It can be extended with many plugins, has a beautiful, easy to use and well-documented API and a simple, readable source code that is a joy to contribute to.