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

FirstFate Social App - FirstFate Social Network App allows users to browse through their shared moments and memories in Augmented Reality or visualize them in a Social Universe or simply scroll on their social profile.

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

Day One - A simple journal application for the Mac, iPhone, and iPad. AboutTo learn more about Day One, see these two excellent reviews . PublishPublish is not available in Day One 2.

Bigtent - BigTent is a web-based organization and communication portal for groups.

FBMessenger - FBMessenger is a stand-alone Facebook Messenger app for Linux, very similar to the official...