Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

AppMockUp - Create the most compelling screenshots for your app.

DownToMeet - DownToMeet is a platform to organize, find, and attend group events.

Placeit - Generate realistic product shots in seconds

Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.

Smartmockups - Create stunning product mockups, easily and online.