Booking.js is an embeddable booking form for websites and mobile devices. It works within your site and product so customers can get get appointments without being redirected away to complete the booking.
Booking.js is simple to set up and fully customizable to empower developers to add a booking engine to their products in minutes.
via BetaList http://bitly.com/1Xt1LCH
Booking.js by Timekit
by Robert Hughey (Google+)