amemiku

The SEO Slugs 4 bbPress plugin removes common words like ‘a’, ‘the’, ‘in’ from post slugs to improve search engine optimization.
For example, when you publish a post with a title like this:
“What You Can Do Immediately For Higher Rankings”,
WordPress automatically assigns a long filename to your post, called a post slug:
/what-you-can-do-immediately-for-higher-rankings
SEO Slugs 4 bbPress plugin strips common words like “what”, “you” or “can” out of your post slug to make it more search engine friendly. With SEO Slugs plugin activated, the slug for our example blog post would look like this:
/immediately-higher-rankings
The slug is generated on saving a post (so you get a chance to look at it before publishing, and change it), or on publish. It won’t overwrite an existing slug. You can force a new slug generation by deleting the existing one.

SEO Slugs 4 bbPress

Removes common words like 'a', 'the', 'in' from post slugs to improve SEO.

Sohaus

Sohaus Clean Emoji Slugs keeps WordPress permalinks clean when editors use emoji in post titles.
By default, WordPress may include emoji or encoded emoji characters in generated slugs. This plugin removes emoji, pictograms, dingbats, variation selectors and related characters from slugs while leaving the original title unchanged.
Example:
❤️ I love WordPress 🩸
Becomes:
i-love-wordpress
The plugin works automatically when a post, page or supported public post type is saved.
<h3>Features</h3>
<ul>
<li>Removes emoji from slugs.</li>
<li>Cleans already encoded emoji in existing slugs when a post is saved, but does not bulk-update old posts automatically.</li>
<li>Keeps emoji in post titles.</li>
<li>Works on save and update.</li>
<li>Supports posts and pages by default.</li>
<li>Does not add database tables.</li>
<li>Does not track users.</li>
<li>Does not send any data to external services.</li>
</ul>

Sohaus Clean Emoji Slugs

Removes emoji and special symbols from WordPress slugs while keeping them in post titles.

SEO Slugs 4 bbPress vs Sohaus Clean Emoji Slugs