SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Site Rank Data - View historical rank information of websites via time series charts.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.