In our themes there are several font icons involved. Sometimes you might want a list of all available icons so that you can choose the one you want easily.
Here I listed few ways to help you.

4) Open THEME/assets/css/themestyle.css file and search for flaticon there you will see list of css classes for the icon. Find the one of your choice and you can use that as a class in Visual composer modules.
The final and probably most complete way is to build your own list of icons that you can use. You can use this app https://icomoon.io/app/#/select to build your own icon lists as easily as point and click. Then you can export them as a icon font and can use. However it does require basic web development skills.