Spling

Spling makes content discovery social. Install the extension first; now,every time you find something interesting bobbing around the web,
click on the extension and it will share new item with friends, family, your Facebook feed or some other community. While this doesn't facilitate content discovery directly, it helps build  a community through which you can discover new source of information .The extension also saves article you just shared in a list. As you share more the list accumulates into a repository,where you can see at first glance what you've shared ,with whom and in which one of various categories.