Gone - An ephemeral to-do list
aTimeLogger - Application for tracking your everyday activities.
Streaks - The to-do list that helps you form good habits.
myPoli - Gameified to-do list and habit tracker.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.