Automatically adds (and/or removes) custom CSS classes to DOM elements when certain elements are clicked. Makes JavaScript onclick and onclick-style events trivial.
Clients provide you an easiest way to add and retrieve clients. Various UI styling to choose to display your client list is the add on you were looking for.
Add File Version (AFV) can automatically or manually add file version to the CSS/JS files that were added using wp_enqueue_style and wp_enqueue_script, admin_enqueue_style and admin_enqueue_script.