Workflowy - A better way to organize your mind.
Planny.co - Planny is lightweight Twitter scheduler. Grow faster with calendar planner, multi account management, advanced drafts and analytics.
Dynalist - Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.
Gone - An ephemeral to-do list
Taleguild - Web application for short story writers and essayists
Day Night - A desktop app that kills the procrastination in you.