Gopher - Better hotel deals automatically, every time + cash back
Hopper - Hopper is the #1 most downloaded travel app in North America! We aspire to be the world’s best — and most fun — place to book travel.
Earny.co - Win prizes on Amazon purchases
Lolli - Earn bitcoin when you shop online
MakCorps - Hotel Price Comparison API
Hotellook - Compare hotel deals from all the leading booking agencies