PushPrime - Supercharge your website with push notifications
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
PushCrew - Push Notifications for Websites
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Proof - Website conversion rate optimization and visitor monitoring
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.