Eric-Oliver Mächler

A simple SEO Plugin which generates for Pages, Posts, Categories:
<ul>
<li>og:type</li>
<li>og:title</li>
<li>og:description</li>
<li>og:image</li>
<li>twitter:title</li>
<li>twitter:description</li>
<li>twitter:image</li>
<li>Meta Robots Tag: index, Follow, NoFollow, NoIndex</li>
</ul>
<h4>The plugin is new multilingual</h4>
Available in English & German
<h4>Plugin Recommendation</h4>
If you need a Sitemap for your WordPress – please install <a href="https://wordpress.org/plugins/simple-xml-sitemap-generator/" rel="ugc">Simple XML Sitemap Generator</a>
If you need a Google Analytics Plugin for your WordPress – please install <a href="https://de.wordpress.org/plugins/quick-google-analytics/" rel="nofollow ugc">Quick Google Analytics</a>

WP Smart SEO

Improve your WordPress SEO: Enter your title, description and featured image for better visibility in the search engine

Kinski &amp; Bourke

This is a super simple plugin for uploaded file name sanitization.
Essentially, it’s to make your uploaded filenames easier for search engines to read, hence better for SEO, nicer to look at in the folder (who cares?), and should also help avoid any issues with naming conventions. 
You might be thinking that WordPress does a good enough job at renaming, but it still allows underscores and other symbols and characters that maybe don’t belong in a filename.
e.g. 
This: Æ, %20 æ Ï, Ö, Ü, Ÿ-boyz_%20__=++&, ©, §)+Ţ ţ++‰+ath-club-ÆØÅæøå–.pdf 
Becomes: AE-20-ae-I-O-U-Y-boyz-20-T-tath-club-AEOAaeoa.pdf 
This: —-___——]- hair space U+200A.jpg 
becomes: hair-space-U200A.jpg
The Original idea for this was done by Vaughn Royko and so we thought we would turn this into a simple plugin with a few options for those who are worried about messing with their functions file, and or can only install plugins and cant edit the Functions file.

SEO File Renamer

Very helpful and smooth plugin. Recommended!

Amazing plugin

A super simple plugin for uploaded file name sanitization.

WP Smart SEO vs SEO File Renamer