HotelTonight Escape - The best getaway deals for tonight (or the weekend)
Omio - GoEuro's new app, book travel transport in Europe 🇪🇺
Hotellook - Compare hotel deals from all the leading booking agencies
Busbud - Search city-to-city bus schedules, compare bus companies and book your tickets online, all over the world. Busbud is the world's bus station.
MakCorps - Hotel Price Comparison API
Pruvo - Hotels prices tend to change even after reservation. Pruvo will notify you when a price drop occurs, so you can rebook the exact room at a much lower price.