As nice scroll is a jquery plugin for WordPress site. This plugin will create a nice scrollbar for your site.
AS login you can fully customize wordpress login page.
Create your custom Login page.
Eazy Login Logo changes the default logo on the login screen.
Hides the WP login page, allows you to "embed" login in a page, and allows customization on how the login page looks.
A simple, lightweight Plugin to Customize Your WordPress Login Screen Amazingly.
Brand and customize your login page without any coding knowledge.