This plugin used to easily add an ajax enabled wordpress login widget to your site's sidebar.
WP Sidebar Login is an ajax enabled wordpress login has both a widget and a template tag to allow you to have a login form in the sidebar of your wordpress powered blog. It lets users login, and then redirects them back to the page they logged in from rather than the backend, it also shows error messages. This plugin adds the capability of placing a login widget in the sidebar with smooth AJAX login effects.
To do a new installation of the plugin, please follow these steps
1. Unzip and upload the php file to your wordpress plugin directory
2. Activate the plugin
3. For a wp sidebar widget: Goto the design > widgets tab – Drag the widget into a sidebar and save!
Check more details about installation and usage here
To use the template tag: Add <?php sidebarlogin(); ?> to your template.
You will find a config page in tools/settings > WP Sidebar Login. Here you can set links and redirects up.
You can check more FAQ on plugin website URL :
WP Sidebar Login