1. All ZK edition contains the complete, latest, major version (6.x) of Font Awesome free icons (built-in, well-integrated, fine-tuned with CSS).

• That means an app dev can just use Font Awesome icons by specifying CSS class at iconSclass or sclass.
• No need to download or include any file manually.
• No need to apply CSS to adjust its size /alignment manually and those icons look well-fit in all ZK components

2. Include the font awesome backward compatibility files upon a library property

<library-property>
     <name>fontawesome4.compatibility</name>
     <value>true</value> <!-- default is false -->
</library-property>