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.
Taab - Travel as a benefit™
Event Hunt - Startups and Tech Events Curated By Locals
Tripsy - Planning your trip has gotten much easier.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets