Gopher - Better hotel deals automatically, every time + cash back
Loopit - Loopit is a streamlined travel idea searching, planning, and sharing platform.
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.
Google Hotel Search - Find a place to stay quickly and easily
MakCorps - Hotel Price Comparison API
Sygic Travel Maps - Itinerary planner for independent travelers