Button for Google Calendar™ - See your daily schedule and join meetings in one-click.
Add to Calendar Generator - Generate 'Add to Calendar' buttons for your website
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Add to Calendar Link Generator - Create buttons for Google Calendar, Office 365 and Apple Cal
Super.cc - Quickly add events to your calendar from any email
Digital inspiration - Digital Inspiration is a popular how-to website that covers computer software, mobile apps, video...