diff --git a/flatlaf-testing/build.gradle.kts b/flatlaf-testing/build.gradle.kts
index 4fd94cba..ea68160d 100644
--- a/flatlaf-testing/build.gradle.kts
+++ b/flatlaf-testing/build.gradle.kts
@@ -33,6 +33,10 @@ dependencies {
 	implementation( "org.swinglabs.swingx:swingx-beaninfo:1.6.5-1" )
 	implementation( "com.jidesoft:jide-oss:3.6.18" )
 	implementation( "org.netbeans.api:org-openide-awt:RELEASE112" )
+
+//	implementation( "org.pushing-pixels:radiance-substance:2.5.1" )
+//	implementation( "com.weblookandfeel:weblaf-ui:1.2.12" )
+//	implementation( "com.jgoodies:jgoodies-looks:2.7.0" )
 }
 
 java {
diff --git a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.java b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.java
index 36ac6541..97f8c5da 100644
--- a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.java
+++ b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.java
@@ -111,6 +111,30 @@ public class FlatTestFrame
 			lafModel.addElement( new LookAndFeelInfo( name, className ) );
 		}
 
+		String substanceClassName = "org.pushingpixels.substance.api.skin.SubstanceGraphiteAquaLookAndFeel";
+		if( SystemInfo.IS_JAVA_9_OR_LATER && isClassAvailable( substanceClassName ) ) {
+			lafModel.addElement( new LookAndFeelInfo( "Substance (F5)", substanceClassName ) );
+			registerSwitchToLookAndFeel( KeyEvent.VK_F5, substanceClassName );
+		}
+
+		String webLafClassName = "com.alee.laf.WebLookAndFeel";
+		if( isClassAvailable( webLafClassName ) ) {
+			lafModel.addElement( new LookAndFeelInfo( "WebLaf (F12)", webLafClassName ) );
+			registerSwitchToLookAndFeel( KeyEvent.VK_F12, webLafClassName );
+		}
+
+		String looksPlasticClassName = "com.jgoodies.looks.plastic.PlasticLookAndFeel";
+		if( isClassAvailable( looksPlasticClassName ) ) {
+			lafModel.addElement( new LookAndFeelInfo( "JGoodies Looks Plastic (F6)", looksPlasticClassName ) );
+			registerSwitchToLookAndFeel( KeyEvent.VK_F6, looksPlasticClassName );
+		}
+
+		String looksWindowsClassName = "com.jgoodies.looks.windows.WindowsLookAndFeel";
+		if( isClassAvailable( looksWindowsClassName ) ) {
+			lafModel.addElement( new LookAndFeelInfo( "JGoodies Looks Windows (F7)", looksWindowsClassName ) );
+			registerSwitchToLookAndFeel( KeyEvent.VK_F7, looksWindowsClassName );
+		}
+
 		lookAndFeelComboBox.setModel( lafModel );
 
 		updateScaleFactorComboBox();
@@ -203,6 +227,15 @@ public class FlatTestFrame
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 	}
 
+	private boolean isClassAvailable( String className ) {
+		try {
+			Class.forName( className );
+			return true;
+		} catch( ClassNotFoundException ex ) {
+			return false;
+		}
+	}
+
 	public void showFrame( Supplier<JComponent> contentFactory ) {
 		this.contentFactory = contentFactory;
 		this.content = contentFactory.get();
@@ -481,6 +514,7 @@ public class FlatTestFrame
 					null));
 
 				//---- lookAndFeelComboBox ----
+				lookAndFeelComboBox.setMaximumRowCount(20);
 				lookAndFeelComboBox.addActionListener(e -> lookAndFeelChanged());
 				buttonBar.add(lookAndFeelComboBox, "cell 0 0");
 
diff --git a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.jfd b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.jfd
index 4a57d740..f92a2a2f 100644
--- a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.jfd
+++ b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.jfd
@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.0.0.194" Java: "11.0.2" encoding: "UTF-8"
+JFDML JFormDesigner: "7.0.0.0.194" Java: "13.0.1" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -27,6 +27,7 @@ new FormModel {
 					name: "buttonBar"
 					add( new FormComponent( "com.formdev.flatlaf.demo.LookAndFeelsComboBox" ) {
 						name: "lookAndFeelComboBox"
+						"maximumRowCount": 20
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "lookAndFeelChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 						"value": "cell 0 0"