Saeed Ullah Khan

In WordPress 2.9 custom post type was introduced, that opened a new world for many WordPress developers. 
When it comes to removing the slug and not destroying the rewrite rules for other post types this plugin works great. 
This only concerns those who are using %postname% as permalink structure and want to add a custom post type so that 
the urls for them are in the same way as normal posts and pages: http://siteurl/%custom_post_type_title%/.
Find more useful tips and plugins: <a href="http://www.arhamsoft.com/" title="More WordPress plugins" rel="nofollow ugc">web tips</a>

Remove All Post Slug

Add rewrite rules for custom post type so that the urls for them are in the same way as normal posts: http://siteurl/%custom_post_type_title%/.

Aluka

Custom Permalinks for Custom Post Types is a plugin for WordPress which allow you change the permalink structure of Custom Post Types.
It supports the following features: 
* Remove base slug of all public Custom Post Types 
* Supports multiple taxonomies for permalink 
* Supports hierarchical taxonomies for permalink 
* Allows to select primary term for permalink 
* Allows to exclude Custom Post Types from being affected by this plugin
<h3>Compatibility</h3>
This plugin is compatible with: WooCommerce, Polylang, WPML
<h3>Privacy Policy</h3>
This plugin doesn’t collect/store any user related information.

Custom Permalinks for Custom Post Types

Remove base slug of Custom Post Types and change the permalink structure of Custom Post Types.

Remove All Post Slug vs Custom Permalinks for Custom Post Types