HotelTonight Escape - The best getaway deals for tonight (or the weekend)
JetRadar - Compare flights from hundreds of airlines & travel agencies
Hotellook - Compare hotel deals from all the leading booking agencies
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
MakCorps - Hotel Price Comparison API
FareUpThere - Earn rewards for your feedback on flights