Multisite Toolbar Additions is a powerful, light weight WordPress plugin that simply adds some very useful admin links in toolbar. It also provides support for various popular third party plugins listed in WP plugin’s page. With this plugin you get quick links to visit admin pages easily. For example: you can access the ‘Nav Menu’ Settings of a sub site/blog using your admin bar from frontend or backend of any subsite.
Social Toolbar is a beautiful and highly customizable toolbar plugin that provides you with color selection, social network icons, recent tweet and share buttons in your website footer.