dytri

This small plugin helps you to do on your site can register and authorize users without the standard form of WordPress, and as to issue a block to display the logged user’s site in the form of “Hi, User!”. The plugin include short codes, that you can use on your pages. You just prescribe the correct code and the page will automatically display the specified form. Initially, D-login is not using their styles, so you have to set up their own so-, as you will need. D-login the perfect choice for your website, all the more so, that it is completely free!
<h4>ShortCodes</h4>
<ul>
<li>dloginuser – displays the login form</li>
<li>dreguser – displays a registration form</li>
</ul>
<h4>Features</h4>
<ul>
<li>Authorization</li>
<li>Registration</li>
<li>Password recovery</li>
<li>Antispam</li>
</ul>
More information can be found on the <a href="http://dytri.com/shop/dlogplugin" rel="nofollow ugc">home page plugin</a>.

D-login

This small plugin helps you to do on your site can register and authorize users without the standard form of WordPress.

NipponMonkey

This plugin automatically logs a user out after a certain period of time of inactivity. 
It creates new meta data for each WP user and checks that the user hasn’t been inactive for too long. 
If the user has been inactive for too long, then the user is automatically logged out and redirected to a URL of your choice. 
It tracks the users activity in both the main site and admin area.
You can set the maximum inactivity time and redirect URL by changing the defined constants in the plugin’s PHP page – no admin menus are available yet see FAQs.
It’s only a single PHP page, so it’s easy to alter to work however you’d like it to work.
It works with BuddyPress too.
Let me know if you find a better way of doing this, and I’ll update the plugin.
<h3>Installation Bug</h3>
[FIXED!] Currently, when you activate the plugin, you are automatically logged out!

Inactivity Auto Sign Out Plugin

This plugin automatically logs out the user after a period of inactivity. The time period can be configured and it works with BuddyPress.

D-login vs Inactivity Auto Sign Out Plugin