João Luís

WordPress allows you to define a site logo (through Jetpack) and a site icon, why would you need to upload another image to use in your login page?
This plugin allows you to forget the login page. Just activate it and all the magic is done for you. No extra steps required.
The plugins uses the site logo if it exists, otherwise it will use the site icon. If none of them exist, the plugin will not touch your login page.

JL Login Logo

Uses your site logo (defined through Jetpack) or your site icon as the logo on the login form.

Tanner Moushey

Jetpack is an amazing plugin with many great features. Sometimes, however, you just want to use a specific feature from Jetpack and don’t want to go through the hassle of connecting Jetpack to your WordPress.com user account. This is where this plugin comes in handy.
Just install this plugin and you will get access to all of the Jetpack modules that do not require a connection to WordPress.com.
If you find that the module you are interested in is not available after installing this plugin, that is an indication that a WordPress.com account is required for that module. These include Site stats, Publicize, and a few others.

Unplug Jetpack

Jetpack's unnecessary requirement to connect to a WordPress.com account is so frustrating. This plugin removes that requirement for all Jetpack modules that don't really on WordPress.com services.



Better than Jetpack itself!

Use Jetpack without needing to connect to WordPress.com

JL Login Logo vs Unplug Jetpack