Wanting to add "Add to Calender" links to your website, email newsletter or email signature? Add Event is a good option, but it's very pricey at $20 a month for amounts to under 100 lines of code. Consider using Calndr.link, a 100% free alterative that developed by atymic, a prolific open source developer and contributor.
Clean UI, no signup, no email, no tracking. Simple & Easy :D