Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
iZooto - Engage your mobile and desktop web users with intelligent web push notifications.
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.