We recently released a tiny new detail new feature: Calculation fields can now yield clickable link badges for list and board layouts - with a proper icon based on whether it is a weblink, a mailto or a call link.
Here’s a sneak peak of how those will look in your app’s list overview:
All three badges are dynamically created links via calculation fields. Keep on reading if you’d like to know how to build this on your own. 
Setup and instructions
In order to yield clickable badges, all you need to to is yield proper URLs, either raw URL strings or in markdown syntax. As markdown provides a nicer result (you can define the label of the link, not only the URL), we will use markdown in this example.
Create a calculation field and make sure to compose a markdown link using your field references and the code you require. In our setup, it is pretty simple for demo purposes:
Use mailto: for email links, and tel: or callto: for phone links:
Our resulting app present three types of links that are all clickable in list and board layouts - nice 
Just as in the past, these links are of course also clickable inside the record.
Shared example to get started
As usual, we created a little shared workspace to give you a head start.
Use this link and the regular “Duplicate” button on the top right to get started:
Clickable calculation links examples share link
Kudos
Thanks to @Hans who originally came up with this idea and created the respective feature request!
Feedback
Feel free to drop your questions and thoughts in the comments 