skipstorm

A really simple plugin that allow users from a settable minimum level to add some text before and after their posts, this can be their adsense code or anything else.
Admin can set a default text, something to add before and after user text and the minimum level users can use this plugin.
Can also be useful for a multi user blog where you want to allow signatures as well as an adsense or anything else plugin for your blog.
<h4>Update v. 0.1.1</h4>
Added SK WP Settings Backup support

SK Multi User Ads

flocsy

Authors Widget shows the list or cloud of the authors, with the number of posts, link to RSS feed next to their name, avatar. It is useful in a multi-author blog, where you want to have the list in the sidemenu. 
The widget can also display an “Author Cloud” if <a href="https://wordpress.org/extend/plugins/seo-tag-cloud/" rel="ugc">SEO Tag Cloud plugin</a> is installed.

Authors Widget

Authors Widget shows the list or cloud of the authors in the sidemenu.

SK Multi User Ads vs Authors Widget