Simpletasks Dropbox vs Flow-e

Just like todo.txt cli, this is 100% free (although donations are accepted).

For those who don't care about syncing there is a cloudless version while people who run Owncloud may opt for the Owncloud version.

This not only tells one's calendar (and thus any devices that sync with your calendar) about the todo, but allows all synced calendars to play an audible alarm when the todo is scheduled to be finished.

Let's one sort to-dos by due date then priority

Stay on top of what's current with due date reminders. Focus on your work, Flow-e's got your cues covered!

Your daily schedule is visualized in a timeline. Setting up meetings and reminders without leaving your mailbox is a click away.

Designed for managers, Flow-e takes you to Inbox zero and beyond by turning your Gmail or Outlook mailbox into a visual taskboard. Personal tasks and emails are now managed from your mailbox in a visual workflow, customized for your process.

Delegate work to your team without leaving your inbox and without sacrificing accountability.