Steem

Steem is a blockchain-based social media platform where anyone can earn rewards.
Collectively, user-generated content has created billions of dollars worth of value for the shareholders of social media companies, such as Reddit, Facebook, and Twitter. Steem supports social media and online communities by returning much of its value to the people who provide contributions by rewarding them with virtual currency.
Steem is one of the most interesting blockchain projects I've seen this year.

Adam B. Levine, Founder of the Let’s Talk Bitcoin podcast, the LTB Network, and Tokenly