I built a tool to aggregate Airbnb, Booking.com, Priceline, Agoda and some other sites you left out. It's http://AllTheRooms.com http://AllTheRooms.com, and it'

I built a tool to aggregate Airbnb, Booking.com, Priceline, Agoda and some other sites you left out. It's http://AllTheRooms.com http://AllTheRooms.com, and it's the only accommodations search engine that includes everything from Airbnb plus all online hotels and hostels.