Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Mirraw - Get all traditional Indian Clothing like Sarees, salwar suits, lehenga, jewellery, Kurta, sherwani and more on one place at best prices with free shipping for India and low cost shipping for USA, UK
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Voodoo Manufacturing - Fast, affordable, high-volume 3D printing
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
3D Hubs - Airbnb for 3D printing