Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Button for Google Calendar™ - See your daily schedule and join meetings in one-click.
Calendarist - Time blocking companion for Google Calendar
Dawn Calendar - AI calendar scheduling tool
Amie - GitHub for research and data science
On-Call Schedule - Quickly update your on-call schedule on Google Calendar