ParkingForMe - Marketplace for listing and renting unused parking spaces
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
On Air Parking - Ridiculously cheap and simple airport parking.
Event Hunt - Startups and Tech Events Curated By Locals
Blucar - On-demand parking at the drop of a pin
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets