Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Pitch Deck Hunt - Real pitch decks from 100+ of the best startups
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
BaseTemplates - The easiest way to build your pitchdeck and raise money
Bigtent - BigTent is a web-based organization and communication portal for groups.
Pitchdeck - Pitch Deck is a web-based solution to you create engaging presentations.