Timo - Time and task management in your browser ⏲
Gone - An ephemeral to-do list
Daily Routine - iOS app that schedules your day into key tasks
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Do You Even List? - Auto updating Twitter list of people you interact with most
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.