HotelTonight Escape - The best getaway deals for tonight (or the weekend)
Expedia - Save up to 60% with Expedia Mobile Exclusive hotel deals!
Hotellook - Compare hotel deals from all the leading booking agencies
Booking.com - Find your next stay. Search deals on hotels, homes, and much more...
MakCorps - Hotel Price Comparison API
Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.