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.

Abiral Neupane

This plugin detects idle user and execute the action that is being specified in Admin End.
The plugin is very minimalistic. Nothing fancy. So, if you are looking for a plugin that adds up security without having to add additional load in your website, you can try this plugin.
From version 2.0, you can now specify the action and time for each user role.
It tracks the users activity in both the front end and admin end.
You can setup Idle Time from WP Admin > Settings > Idle User Logout
Once you reach Idle User Logout Page, you can setup behavior of the plugin for each user\’s role.
If there is any problem, or need any help, we can give you a helping hand.

Idle User Logout

Just what I was looking for! Thanks for making this plugin!!!



Awesome!

This plugin automatically logs out the user after a period of idle time. The time period can be configured from admin end.

Inactivity Auto Sign Out Plugin vs Idle User Logout