This is basic HTML
If you are not too savvy with HTML you can inspect the site where you saw the ones above and copy the HTML then customize it for your own icons and text
A basic icon plus text HTML would look like
<img class="myicons" src="ImageUrl"/><span class="mycaption"> Your text here</span>
<img class="myicons" src="ImageUrl"/><span class="mycaption"> Your text here</span>
<img class="myicons" src="ImageUrl"/><span class="mycaption"> Your text here</span>
And you can style the icon using the myicons class or style the text using the mycaption class
You can also add links if you like
You put this HTML in a Custom HTML widget