Vast HTML

This is a full featured plugin to help you edit your login just the way you want it. Lets you use or block the original wordpress 
css (the first plugin to do this). Comes with one pre made style you can use or deactivate. 
Very easy to create your own style using the style tags givin in the plugin. 
Please visit http://vasthtml.com/js/login-xchange-plugin/ for usage instructions.

Login XChange

This plugin will let you change the css of your login and register pages.

burak

This plugin disable auto-generated registration password and allow users to create own password on registration page.

Custom Registration

This plugin disable auto-generated registration password and allow users to create own password on registration page.

Login XChange vs Custom Registration