Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Tuio - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Sawyer - Discover a wonder-filled world of kids classes, camps, events, and activities, right in your neighborhood
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Yusp - Yusp is a next generation, real-time personalization engine having all product modules as defined by Gartner for various business models.