athlan

Plugin allows to use post’s custom fields values in permalink structure by adding <code>%field_fieldname%</code> rewrite tag.
Examples:
<ul>
<li><code>http://example.com/%field_event_date_from%/%postname%/</code></li>
<li><code>http://example.com/post-type/%field_event_date_from%/%postname%/</code> (with <a href="https://wordpress.org/plugins/custom-post-type-permalinks/" rel="ugc">Custom Post Type Permalinks</a> plugin)</li>
</ul>
You can also set different permalink structure depending on custom post type using <a href="https://wordpress.org/plugins/custom-post-type-permalinks/" rel="ugc">Custom Post Type Permalinks</a> plugin. You can create own post types by using <a href="https://wordpress.org/plugins/custom-post-type-ui/" rel="ugc">Custom Post Type UI</a> plugin.
The plugin works for:
<ul>
<li>posts</li>
<li>pages</li>
<li>custom post types</li>
</ul>
Plugin is also available on GitHub: 
<a href="https://github.com/athlan/wordpress-custom-fields-permalink-plugin" rel="nofollow ugc">https://github.com/athlan/wordpress-custom-fields-permalink-plugin</a>

Custom Fields Permalink 2

Plugin allows to use post's custom fields values in permalink structure by adding %field_fieldname%, for posts, pages and custom post types.

Rick Radko

This plugin removes the ‘/blog’ slug from the main site permalinks of a sub-folder multisite install. The intended purpose for this plugin 
is for multilingual installations where the main site is the default language (although I’m sure there are other applications). These sites 
are of often for businesses where having the ‘/blog’ in the permalink (URL) does not make sense.
‘/blog’ is automatically removed from the main site permalinks upon plugin activation.
‘/blog’ is automatically restored in permalinks upon plugin deactivation.

R3DF Multisite Blog Slug Remover

Removes the '/blog' slug from the main site permalinks in a multisite.

Custom Fields Permalink 2 vs R3DF Multisite Blog Slug Remover