Dynalist - Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.

Orgzly - Outliner for notes, tasks and to-dos

Workflowy - A better way to organize your mind.

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.

Indigrid - Plain text outliner with side-by-side views.

Notin - Notin – notes in notification app helps users in creating alarms to get reminders about important tasks right on the home screen.