Ethereum Push Notification Service - Protocol for incentivized, blockchain based notifications.
Topick - Gather around your favorite topics.
Blockbutler - Real-time transaction notifications for the blockchain
Flipboard - Your Personal Magazine. Find, follow and flip stories that change your world.
Notif.me SDK - A Node.js lib to send all your transactional notifications
10 Word News - Only news that matters. Every story is exactly ten words.