SashiDo.io - SashiDo is the Parse Alternative for busy people.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
PushWizard - Push notification delivery and analytics platform.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Pusher Beams - Send push notifications programmatically at scale
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.