RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Tabwave - Replace your new tab with a mindful productive app
TimeFlip - Human-friendly time tracker
Reboot - It's okay to take a break
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Breaktime - Break time is an app that reminds you to stand up every chosen amount of time.