Add to Calendar Link Generator.
Cal.et is a simple and free “Add to Calendar” link generator that can be shared on social media, newsletters, websites, emails, and everywhere else with ease.
Cal.et's answer:
Cal.et is simply free and easy to use.
Microsoft Outlook Calendar - Calendar is a time-management web application by Microsoft.
AddEvent - AddEvent is an Add to Calendar button for one-time and multiple events.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Add to Calendar Generator - Generate 'Add to Calendar' buttons for your website
Google Calendar - Spend less time managing your day & more time enjoying it
Optim’Match - Optim’Match is a platform that enables users to unleash the power of machine learning to attract, convert, and retain customers.