Habitica - Habitica is a free habit building and productivity application.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.
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.
SuperBetter - Empower youth mental health through schools and sports
TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.