Habitica - Habitica is a free habit building and productivity application.
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.
LifeRPG - Automatically prioritize your goals and gain XP for achieving them. Features:
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.
Clockify - Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.