Add Network plugins links to WordPress Toolbar

gistfile1.php

/**
 * Add plugin page links to Toolbar in Multisite
 *
 * Adds Toolbar link to the 'Plugins' list page in Network Admin
 * Adds Toolbar link to 'Add New Plugin' in Network Admin
 * @uses global $wp_admin_bar
 */
function ww_ms_plugin_toolbar_links() {
	global $wp_admin_bar;

	// Don't show for logged out users or single site mode.
	if ( ! is_user_logged_in() || ! is_multisite() )
		return;

	// Show only when the user has at least one site, or they're a super admin.
	if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )
		return;
		
	// First, pre-emptively remove a couple Network Admin menu items. We'll add them back later.
	$wp_admin_bar->remove_node('network-admin-u');  // Network Admin > Users
	$wp_admin_bar->remove_node('network-admin-v');	// Network Admin > Visit Network

	// Add a link to the Network > Plugins page.
	$wp_admin_bar->add_node( array(
		'parent' => 'network-admin',
		'id'     => 'network-admin-p',
		'title'  => __( 'Plugins' ),
		'href'   => network_admin_url( 'plugins.php' ),
	) );
	
	// Add a link to the Network > Add New Plugin page.
	$wp_admin_bar->add_node( array(
		'parent' => 'network-admin',
		'id'     => 'network-admin-pi',
		'title'  => __( 'Install Plugin' ),
		'href'   => network_admin_url( 'plugin-install.php' ),
	) );
	
	// Re-add the Users link after Plugins
	$wp_admin_bar->add_node( array(
		'parent' => 'network-admin',
		'id'     => 'network-admin-u',
		'title'  => __( 'Users' ),
		'href'   => network_admin_url( 'users.php' ),
	) );
	
	// Re-add the Visit Network link at the very end.
	$wp_admin_bar->add_node( array(
		'parent' => 'network-admin',
		'id'     => 'network-admin-v',
		'title'  => __( 'Visit Network' ),
		'href'   => network_home_url(),
	) );	
	
}
add_action( 'wp_before_admin_bar_render', 'ww_ms_plugin_toolbar_links' );