Button for Google Calendar™ - See your daily schedule and join meetings in one-click.
Calndr.link - Dead simple & free add to calendar links + API
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Add to Calendar Generator - Generate 'Add to Calendar' buttons for your website
Digital inspiration - Digital Inspiration is a popular how-to website that covers computer software, mobile apps, video...
Meeter - Hop in and out of calls, directly from your menu bar