Text Event Pics - Text a number to store and share photos together
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
The Bosco - High tech photo-boothing for any event
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Milofy - Socialize with other like-minded couples
Bigtent - BigTent is a web-based organization and communication portal for groups.