Boatsetter - Rent a boat, with or without a captain. Powerboats and sailboats, anywhere in the country.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Antlos - Airbnb for boats
Event Hunt - Startups and Tech Events Curated By Locals
Samboat - The global airbnb for boats
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets