Gridcoin is currently the only coin rewarding BOINC computations (mostly scientific projects, but can be virtually any kind of distributed computing). There are over 4.3 million registered BOINC users.
Reddit: https://www.reddit.com/r/gridcoin
CCT: https://cryptocurrencytalk.com/topic/1331-new-coin-launch-announcement-grc-gridcoin/
Bitcointalk: https://bitcointalk.org/index.php?topic=324118.0
Twitter: https://twitter.com/GridcoinNetwork
Telegram: https://telegram.me/gridcoin
Slack: https://teamgridcoin.slack.com/
Web: www.gridcoin.us