Pickadate.js is a fully responsive and lightweight jQuery dateinput picker. It looks pretty neat and simple. It is easy to use. And alos, you can have different themes for it as well.
It has been tested on IE7+, Chrome, Firefox, Safari, Opera, iOS Safari, Android browser. The pickadate.js script supports all modern browsers and IE 9+. To support IE 7+ and other old browsers, include pickadate.legacy.js instead. It is released under MIT License.