Artberri

For a better SEO, it is said that the URLs must give information about the content of the web page. Because of this most people uses pretty URLs in wordpress with the permalink options. But the post slug in the URL is generated from the title of the post, and some times this slug is too long because we don’t remove the stopwords, common words without an important meaning, that don’t add anything significant to the URL.
This plugin removes the stopwords from the URLs for better SEO optimization of your blog and for making better and smaller URLs. You can set the stopwords through the `Plugins’ menu in WordPress wp-admin.
For example:
<ul>
<li>You have set the next stopwords: a, an, the, i, you, he, she, we, they, of</li>
<li>You write a post called: Review of the Google Chrome Browser</li>
<li>The normal post slug would be: review-of-the-google-chrome-browser</li>
<li>But the optimized slug is: review-google-chrome-browser</li>
</ul>
All configuration is done through wp-admin. No code editing is necessary.

Remove Stopwords From Slug

This plugin removes the stopwords from the URLs for better SEO optimization of your blog. You can set the stopwords in the admin panel.

texttheater

NOTE: recent WordPress versions already properly transliterate umlauts if the 
site language is German. In that case, German Slugs is no longer needed.
While creating a post or page, WordPress automatically suggests a permalink. If 
your permalink structure contains the %postname% tag, then the title of your 
post or page will be used, simplified by conversion to lowercase, replacing 
spaces with hyphens, removing certain punctuation characters and removing 
diacritics from latin letters.
Thus, by default, ä is replaced with a, ö with o, ü with u and ß with s (similar 
for capital letters). For German, the conventional transliteration is ä to ae, ö 
to oe, ü to ue and ß to ss (sometimes sz in Austria, this is not yet supported). 
This plugin makes your WordPress apply the conventional transliteration.
I wrote this plugin because manually correcting WordPress’s suggestions is a 
considerable hassle, especially if you decide to change the title afterwards.
<h3>Support</h3>
If you have questions or suggestions, contact me at poststelle ät texttheater döt 
net.

German Slugs

German Slugs properly transliterates umlauts and the letter ß appearing in titles for slugs (i.e. for pretty permalinks).

Remove Stopwords From Slug vs German Slugs