tgrk

Using Custom Logo you can replace WP default login/register page logo by placing URL to custom logo 
you have (in proper size of course ;)). It is done using JavaScript onload event. It is not ideal, because 
there is small delay. I will try to improve it as soon as possible(I created it because of need for one small 
project…). Reason for using approach is seamless WP upgrades without any need for backup wp-admin.css or 
changed wordpress-logo.png.

Custom Logo

Replace WordPress default login/register page logo with custom one.

tepelstreel

If you are working for a customer or you just want to set a page for a community (band, choir etc.) they might appreciate their own logo at the login screen. With this plugin, you can even go further and style your whole login page according to your needs. At the moment, there is only the way for ‘dummies’ to style the page, but in a future version you will be able to enter some css code yourself and the final goal is, also to offer the possibility to copy an entire stylesheet into the plugin, to have the most freedom of styling and changing the items on your loginscreen. Since version 1.7 the A5 Custom Login Page is also for a WP networksetup.
Fromon Version 2.2, you can redirect different user roles to different pages after login. There is now also a custom login widget that you can style according to your needs and display it on your blog. Or only in the categories or posts. The widget is very flexible and you can show it on your whole site or only on post pages or only the frontpage etc.
Fromon Version 2.7 there’s a shortcode [a5-login-form], to get your login form wherever you want.

Custom Logo vs A5 Custom Login Page