Peak - Peak is the automated way to keep track of what everyone is working on.
KosmoTime - The to do list with super powers
Planny.co - Planny is lightweight Twitter scheduler. Grow faster with calendar planner, multi account management, advanced drafts and analytics.
Cron - Cron Calendar.
Streaks - The to-do list that helps you form good habits.
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.