Index: src/wp-includes/admin-bar.php
===================================================================
--- src/wp-includes/admin-bar.php	(revision 53486)
+++ src/wp-includes/admin-bar.php	(working copy)
@@ -156,6 +156,15 @@
 		);
 	}
 
+	$wp_admin_bar->add_node(
+		array(
+			'parent' => 'wp-logo-external',
+			'id'     => 'wp-logo-external-heading',
+			'title'  => __( 'External links' ),
+			'href'   => false,
+		)
+	);
+
 	// Add WordPress.org link.
 	$wp_admin_bar->add_node(
 		array(
Index: src/wp-includes/css/admin-bar.css
===================================================================
--- src/wp-includes/css/admin-bar.css	(revision 53486)
+++ src/wp-includes/css/admin-bar.css	(working copy)
@@ -176,11 +176,13 @@
 	float: none;
 }
 
+#wpadminbar #wp-admin-bar-wp-logo-external-heading .ab-empty-item,
 #wpadminbar .quicklinks .menupop ul li a strong {
 	font-weight: 600;
 }
 
 #wpadminbar .quicklinks .menupop ul li .ab-item,
+#wpadminbar #wp-admin-bar-wp-logo-external-heading .ab-empty-item,
 #wpadminbar .quicklinks .menupop ul li a strong,
 #wpadminbar .quicklinks .menupop.hover ul li .ab-item,
 #wpadminbar.nojs .quicklinks .menupop:hover ul li .ab-item,