Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

All Note Pro - All Note Pro app contains features to enable users to write their new ideas and important details on their mobile phone to share them with the outside world.

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

Orgzly - Outliner for notes, tasks and to-dos

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.

Volume Control Panel Pro - Volume Control Panel Pro is an efficient mobile app that enables its users to control the volume of the system conveniently.