Besides Facebook, Google, Youtube, Reddit, Hubski, etc. I'm wondering what kind of smaller and lesser known sites the hubski crowd uses. I ask because I'm looking for websites to spend time on besides just Hubski and Reddit.
News sites? Any other aggregators?
What about social networking sites?
Perhaps not unknown, but I haven't met many people who are aware of khanacademy.
If you're looking to learn, check this guy out. He knows what he's doing. And it's totally, 100% free.