Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Sygic Travel Maps - Itinerary planner for independent travelers

Facebook Local - Discover places to go and events happening near you

Tripsy - Planning your trip has gotten much easier.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Roadtrippers - The ultimate road trip planner to help you discover extraordinary places, book hotels, and share itineraries all from the map.