KosmoTime - The to do list with super powers
Cron - Cron Calendar.
Things - Things is an easy to use task manager.
Taskful - Deadlines, meet your match.
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Outplanr - Turn your to-do list into a real work plan