Kerfred

Displays the current rewrite rules for the site. Requires the debug bar plugin.

Debug Bar Rewrite Rules

Displays the current rewrite rules for the site. Requires the debug bar plugin.

Per Søderlind

While working on my <a href="https://wordpress.org/extend/plugins/read-offline/" rel="ugc">Read Offline</a> plugin, I wanted to implement permalinks. After intensive googling and reading the WordPress source I thought I’d share my findings.
This commented plugin demonstrates how to implement a custom permalink for your plugin. To test, add the <code>[mypermalink]</code> or <code>[mypermalink val="ipsum"]</code> shortcode to a page or post.
You can <a href="http://soderlind.no/archives/2012/11/01/wordpress-plugins-and-permalinks-how-to-use-pretty-links-in-your-plugin/" rel="nofollow ugc">view the plugin source</a> at soderlind.no

My Permalink Demo

Demo plugin to show how to add a custom permalink to your plugin

Debug Bar Rewrite Rules vs My Permalink Demo