Outspline - Extensible outliner and personal time organizer to manage todo lists, schedule tasks, remind events.
Orgzly - Outliner for notes, tasks and to-dos
EditiX - EditiX is a quality Open Source XML Editor and XSLT Editor for Windows, Mac OS X and Linux. Test for Free with our 30-day Trial !
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.
Dynalist - Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.
Notin - Notin – notes in notification app helps users in creating alarms to get reminders about important tasks right on the home screen.