Danillo Nunes

Login-box is a WordPress plugin that inserts into all your pages a login form, making faster the authentication process. As the Login-box is hidden, it doesn’t draws attention of your readers to this part of the blog that doesn’t interest them, but, for you (and the others editors of your blog), becomes quite practical to be opened with a simple combination of keys.
The Login-box presents a visual identical to the default login page of WordPress, but it can be easily modified with themes.
<h3>Options</h3>
Login-box 2.0 has a practical and self-explanatory options panel where you can change your settings, it is accessible within the page “Design”, into the panel of WordPress.
Alternatively, you can edit the options directly into a PHP file, which eliminates the database queries and significantly improves the performance if your blog has a lot of access. Open the login-box-config-sample.php, edit the following lines and at the end, save it with the name login-box-config.php.
<ol>
<li>@define(“LB_THEME”, “wp25”);</li>
</ol>
In this line, put the name of the theme that you like to use. You can download new themes on web or make your theme based in the defaults “wp25” and “wpclassic”.
<ol>
<li>@define(“LB_KEY”, “e”);</li>
</ol>
Choose the key (case insensitive) that will be open/close Login-box with Ctrl or Alt. Note that some keys executes especial functions in your browser (and in browser of your readers!). and them will be cancelled by Login-box. (e.g. Ctrl + A selects all). I recommend that you leave the default value “e”.
<ol>
<li>@define(“LB_CTRL”, true);</li>
</ol>
Also, you can define false here and deactivate the Ctrl use of Login-box. So, you can put “a” in LB_KEY, and open Login-box with Alt + A. Ctrl + A will be selects all normally.
<ol>
<li>@define(“LB_BACKTOPAGE”, true);</li>
</ol>
Here, choose on you will be redirected when success login. If true, you will be back to the actual page; if false, you will be redirected to the WordPress Dashboard.
<ol>
<li>@define(“LB_FADE”, true);</li>
</ol>
Here, set true if you want that Login-box opens with a fade-in effect; Set false if not want.
<ol>
<li>@define(“LB_AUTO”, true);</li>
</ol>
Here, leave true and the Login-box will be automatically inserted into your blog (see steps 3 and 4 of the “install” section); If you prefer to choose where the Login-box will appear in your blog, set here as false and put in its theme, the code <code><?php loginbox(); ?></code> where you want it to appear.

Login-box

Login-box inserts into all your pages a "lightbox style" login form, that can be opened with Ctrl + E, making faster the authentication proc …

codersantosh

AcmeIT

AddonsPress

Yam B Chhetri

This plugin limits login to one device at a time for a user. 
If the same user login from another device, that user won’t be allowed to log in. 
Admin can set up an ‘Already login message’ for that user.
If the user has been inactive for too long, then the user is automatically logged out and that user allows to log in again either from the same device or another device. 
Admin can set up ‘Auto Logout Duration’ for users.
It tracks the user’s activity like user status ( Active/Inactive ) and Last active time. 
Admin can view user status from WP Admin > Users > All users. From the “User Status” column, the user current status can be viewed.
Admin can set up only one device login limit plugin from WP Admin > Settings > Limit login
Note: This plugin is compatible with most of the membership plugins. 
If you find any issues, please use <a href="https://wordpress.org/support/plugin/only-one-device-login-limit" rel="ugc">support forum</a> to report.

Only one device login limit

Very useful plugin for security purposes



works like a charm

Limit login to one device at a time for a user. Configured options from the admin

Login-box vs Only one device login limit