Design Principles - An open source repository of design principles and methods

Orgzly - Outliner for notes, tasks and to-dos

Facebook Design Resources - A collection of free resources made by designers at Facebook

Light Notes - Light Notes app features options to help users easily taking notes to remember important details and instructions. You can add new notes by entering the title, description and selecting the tile color according to the priority of the task.

Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.

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.