Gopher - Better hotel deals automatically, every time + cash back
Boatsetter - Rent a boat, with or without a captain. Powerboats and sailboats, anywhere in the country.
Agoda YCS for hotels only - Agoda YCS for hotels only is a traveling app that comes up with features to help users in minimizing their hotel booking efforts by providing them with a large number of choices all around the globe.
Sailo - Airbnb for boats
HotelTonight Escape - The best getaway deals for tonight (or the weekend)
GetMyBoat - Book boat rentals, charters, tours, and lessons in 171 countries around the world.