Eth2Phone - Send ether to anyone simply by phone number
Notif.me SDK - A Node.js lib to send all your transactional notifications
Cardlet - Rediscover the magic of card giving
Clank - Explore the biggest crypto transactions across blockchains
Ethereum Live - All the latest updates on Ethereum
Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.