This is a super simple plugin that displays a specific post by post name (slug) or id. This plugin is very light weight and easy to use in pages, posts, sidebars, or anywhere shortcodes are processed.

Shortcodes allowing you to display GET parameters from the current URL in pages and posts, or show/hide content depending on GET param values

With URL Emailer you can easily and quickly send emails when a web page is accessed or loaded. With the help of various URL parameters such as recipient, subject, etc., the email delivery can be fully customized

Qstring is a plugin to allow to access get parameters from query string or URL easily

Easy theme change in the get parameter. Can be used theme to demo. this to be a per-session only change, and one that everyone (all visitors) can use.

Manage 301 redirections, keep track of 404 errors, and improve your site, with no knowledge of Apache or Nginx needed.

WP Get allows you to display content in posts dynamically, based on URL parameters.

Lets you output a POST or GET variable in the page via shortcode.