I just finished working on this small app that lets you generate an add-to-calendar link that you can share or use in a marketing email. As part of the project I also created a script that consumes url query parameters and builds the add-to-calendar link for a general .ics file or specifically for Google Calendar, Outlook Calendar or Yahoo Calendar.
The app’s functionality is coded using jQuery and PHP. The UI of the app is inspired heavily by a Singup form UI design that Konstantin Shcherbina posted here: https://dribbble.com/shots/2915274-Sign-Up. I really liked the feeling it gave and that is what I wanted to have in this app. I didn’t have lots of time for the design part pf the project so taking an idea and adapting it for my use was what I ended up doing.