Plan - Plan is a better way to organize.
Cron - Cron Calendar.
Outplanr - Turn your to-do list into a real work plan
KosmoTime - The to do list with super powers
Clean Google Calendar - Makes Google Calendar look nicer & launches as a desktop app
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.