WP Outdated Browser

Display a notification box on the single view of your outdated posts, given a set amount of time (configurable).

This plugin adds a message before or after your post content when this post is outdated

WP-UserAgent is a simple plugin that allows you to display details about a computer's operating system or web browser that your visitors comment …

Lets browsers search your site straight from the address bar.

This WordPress plugin contains a web Qr scanner with a redirect function. It is also possible to embed a custom QR code for a website via a shortcode.

This plugin blocks non-admin users from using inspect element, while still allowing access those with manage_options permission.