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Time Doctor - Time Tracking and Time Management Software that is accurate and helps you to get a lot more done each day.
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
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.
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.
Hubstaff - Simple yet powerful employee work tracker with screenshots, timesheets, billing, in-depth reports, and more. Understand productivity issues and act on them.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.