Google+ is a place to connect with friends and family, and explore all of your interests.
Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.
MetaFilter is a community weblog that anyone can contribute a link or comment to.
Join Classmates.com for Free! Reconnect with high school friends, browse the biggest database of online yearbooks and/or plan high school reunions.
Google+ is a place to connect with friends and family, and explore all of your interests.
Summaries of the latest science useful in life. Everything from health, fitness, and nutrition, to productivity, happiness, sleep, and creativity.
Expedition Portal is a community of adventure travelers, where the primary means of exploration is by 4wd and motorcycle.
The simplest way to keep notes. Light, clean, and free. Simplenote is now available for iOS, Android, Mac, and the web.