Offpeak — Avoid peak travel dates and get the best hotel rates
Hopper — the award-winning mobile app that doesn’t just let you book flights from your phone: It also tells you when is the best time to buy. No spam. No ads. No popups. No time wasted. Just the confidence that you’re booking smart and saving money.
Kayak — a fare aggregator and travel metasearch engine
CancelOn — Sell and Buy Non-Refundable Hotel Reservations
Murmanov. My Way of Travelling 