Add Plugins menu item to top level admin bar in WordPress

snippet.php

<?php
/**
 * Customize admin bar items
 *
 * @since 1.0
 * @author Jon Brown
 * @global array $wp_admin_bar
 */
function s9_customize_admin_bar_items() {
	global $wp_admin_bar;
	if ( current_user_can( 'activate_plugins' ) ) {
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'plugins', 'title' => __( 'Plugins' ), 'href' => admin_url( 'plugins.php' ) ) ); }
}
add_action( 'wp_before_admin_bar_render', 's9_customize_admin_bar_items' );