Habitica - Habitica is a free habit building and productivity application.

Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.

Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...

Add-to-Calendar Button Generator - This open source projects lets everybody create amazing buttons, where users can add events to their calendars.

Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.

Plan - Plan is a better way to organize.