Time Clickers - Time Clickers is an Awesome, Free-to-play, Action, Clicker, Role-playing, FPS, and Single-player video game developed and published by Proton Studio Inc.
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.
Sakura Clicker - Sakura Clicker is an Amazing, Free-to-play, Action-Adventure, Idle-Clicker, and Single-player video game developed by Winged Cloud and published by Sekai Project.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Cookie Collector 2 - Cookie Collector 2 is an Amazing, Action Role-playing, Clicker, and Single-player Simulation created and published by Pixelcube Studios Inc.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.