arthurlacoste

Add more files extensions with a new field in your Medias Settings.
<a href="http://irz.fr/add-more-files-extensions/" rel="nofollow ugc">You can check the dev page</a>
You just need to insert your extensions in <code>Settings > Medias > Uploading Files</code> separate by a space (ex : ‘exe pdf rar’), and the plugin does the rest.
This plugin is in french but the translation in english is in progress.

Add more files extensions

Add more files extensions with a new field in your Medias Settings.

Kushang Tailor

Now manage your Media files security with this plugin. This plugin is provide allow and disallow different upload file Mime types to the WordPress Media Library. In other words, Restrict the Mime types or extensions as per your wish.
Almost 96 extensions and Mime types are available.

Restrict WP Upload Type

This plugin is use for to allow and disallow different upload file Mime types to the Wordpress Media Library. Easy to use and flexible.

Add more files extensions vs Restrict WP Upload Type