Ethereum Push Notification Service - Protocol for incentivized, blockchain based notifications.
WordUp App - Discover the smartest app for learning English vocabulary, improving pronunciation, and excelling in exams like IELTS and TOEFL. Start exploring WordUp today.
Blockbutler - Real-time transaction notifications for the blockchain
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Notif.me SDK - A Node.js lib to send all your transactional notifications
1up Events - Corporate events as a service