hauxh

This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string] 
Specify the key in a custom value called “key” with the [string] or use the built in widget.
Stable version of the plugin are pushed to the WordPress repository, 
but the latest version of the plugin can be found at: 
https://bitbucket.org/excion/wpkeyme/
Issues/Bugs: https://bitbucket.org/excion/wpkeyme/issues

WPKeyMe

This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string]

Josh Davis

Display hashed URL values in your page content using simple shortcode. Ex. Visit josh.dvvvvvvvv.com/#name=Bob – replace ‘Bob’ with anything else for a different result.

HashLibs

Display hashed URL values in your page content. Ex. Visit josh.dvvvvvvvv.com/#name=Bob - change 'Bob' to anything else for a different resul …

WPKeyMe vs HashLibs