Pusher Beams - Send push notifications programmatically at scale
Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.
Pingy - Check your site status from your menubar
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Snowball Smart Notifications - Get the notifications you want and none of the rest
iZooto - Engage your mobile and desktop web users with intelligent web push notifications.