Pusher Beams - Send push notifications programmatically at scale

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

F5Bot - F5Bot will send you an email whenever your brand, product, or keyword is mentioned online.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Push Notification Preview - A simple tool for previewing push notification copy

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.