Gone - An ephemeral to-do list
Timo - Time and task management in your browser ⏲
Simpli - Keep track of email, calendars, notes and more in a unified interface.
Daily Routine - iOS app that schedules your day into key tasks
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Do You Even List? - Auto updating Twitter list of people you interact with most