Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
Hubski - Hubski is a community for sharing thoughtful information and conversation.
Wiki Answers - Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias.
TopTopic - TopTopic is an uplifting space to create, discover, discuss and earn from compelling content.
Quora - Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers.
Raddle - A web-based forum where users submit links, pictures, posts, etc.