Sygic Travel Maps - Itinerary planner for independent travelers
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Tripsy - Planning your trip has gotten much easier.
Event Hunt - Startups and Tech Events Curated By Locals
TRAVO - Instantly create end-to-end trips around your events.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets