Mention darklaf-extensions.

README.md

@@ -128,6 +128,10 @@ They can be found [here](https://github.com/weisJ/darklaf/wiki/Features#alternat
 
 This LookAndFeel supports custom window decorations (only on Windows at this point). In contrast to most other LaFs the native window behaviour is not compromised giving a seamless experience that still looks native.
 
+# Extensions
+Check out the [darklaf-extension project](https://github.com/weisJ/darklaf-extensions) for additional artifacts which add
+support for some third-party projects.
+
 # Build
 
     ./gradlew build