⚠️ 2024-01-08 update: Some people decided to distribute my plugin with license requirement removed, without having the decency to tell me about it. No acknowledgement, simply a total lack of respect, while I allowed users to support me financially only if they wished to. I am working hard on this plugin since 2018, allowing users to explore the code and optionally support my work. So I had to make the difficult decision to stop distributing the source code. You can still access old code's history. Well played.... ⚠️
You can still open issues and discussions.

Intellij IDEA (Community and Ultimate) plugin that adds icons for files like Travis YML, Appveyor YML, Git sub-modules, etc.
You can also register your own icons in order to override file icons, but also all IDE icons (including toolbars, menus, etc.). It works with all JetBrains products like IntelliJ (ultimate and community), PyCharm, WebStorm, DataGrip, etc.
To get started with this plugin, please see this guide.

Download plugin from the JetBrains marketplace or via your IDE: File, Settings..., Plugins, Marketplace.