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Mustafa Uysal

AppThemes

By default, when a visitor accesses your site, the admin bar is not shown. This makes sense for a blog, where you’re the only one that has an account.
However, if you’re running a site where most visitors need to be logged in before doing anything useful, you probably want to make it as easy as possible for them to log in or register.
This is what this plugin is for: it shows the login form right there in the admin bar, so that users don’t need to load another page just to enter their username and password.

Admin Bar Login

Show login form in the admin bar for non-logged-in users.

Volkan Kucukcakar

Show WordPress toolbar (formerly admin bar) with a login button on front end for remembered (previously logged in) browsers. Miscellaneous show/hide/remember toolbar options.
Features: 
* Force display toolbar and adds “Login” button and “Forget Browser (Hide)” buttons to front end on remembered browsers. 
* Remember browser timeout option (cookie expire timeout) 
* Remember user option (user roles support) 
* Options to show or hide toolbar separately for logged in and logged out (but remembered) users. 
* Uninstall option to remove plugin settings on plugin deactivation

Toolbar Login Button

Show Wordpress toolbar (admin bar) with a login button on front end for remembered (previously logged in) browsers. Misc. show/hide/remember options.

Admin Bar Login vs Toolbar Login Button