Micro-blogging
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Tweetree - Birds in a tree.
What is Tweetree? Tweetree puts your Twitter stream in a tree so you can see the posts people are replying to in context. It also pulls in lots of external content like twitpic photos, youtube videos and more, so that you can see them right in your stream without having to click through every link your friends post.GroupTweet | Helping groups communicate privately via Twitter - Twitter Groups are here!
Unlimited Contributors GroupTweet enables 2 to 100,000+ contributors to tweet from the same account.
– Edmodo provides a safe and easy way for your class to connect and collaborate, share content, and access homework, grades and school notices.
Edmodo | Réseau social éducatif sécuritaire pour enseignants et élèves