Derrick Tennant

This plugin adds attribution inputs to the media uploader and “edit media” page. It includes a number of creative common license, public domain, fair use, and standard copyright. It will link back to the author’s page at either the end of a post/page and/or the attachment page. If you have a Flickr API key, it can automatically pull information for Flickr images (copyright, author name, title, description, etc). 
It adds a few settings to the Media settings page. You can add a Flickr API key, or display Creative Common logos for their respective licenses.
To style the attributions, I’ve added these CSS classes:
<ul>
<li>a2k-container – A div that contains all of the other elements</li>
<li>a2k-sources – Contains the text “Source:” or “Sources:” depending on the context</li>
<li>a2k-title – The attachment title</li>
<li>a2k-copyright – The copyright information. It may or may not contain an img tag, depending on your settings</li>
<li>a2k-author – The author information. If an author link is provded, it will contain an a tag.</li>
</ul>
Feel free to contact me, emrikol@gmail.com, if you have any problems or questions.

Attributron 2000

Easily add attribution to attachments and have them displayed on your posts.

MakerBlock

Easy CC License creates a WordPress shortcode for adding <a href="http://creativecommons.org/choose/" rel="nofollow ugc">Creative Commons license</a> information to your posts. All you have to do is use the shortcode <code>[ezcc]</code> in any post and the plugin does the rest. The plugin also gives you the option of including a Creative Commons license at the end of every post, every page, or every post and page.
If you like this plugin, <a href="https://wordpress.org/extend/plugins/easy-cc-license/" rel="ugc">please give it a 5-star rating over here –></a>
This plugin comes with an uninstall feature, so it won’t leave any trace in your database after it has been uninstalled. It also caches your license settings so that it doesn’t slow down your website with unnecessary calls to the Creative Commons API. It doesn’t create extra tables, content types, or taxonomies.
And, you can always <a href="http://makerblock.com/2012/02/wordpress-plugin-easy-cc-license/" rel="nofollow ugc">visit my website</a> (It’s mostly about awesome open source robots, if you’re into that kinda thing).
<h3>To Do List</h3>
<ul>
<li>Create an option for small image. Right now it is hardcoded for the large image.</li>
<li>Create an option to override global license options on a per-shortcode basis.</li>
<li>Include multi-language support.</li>
</ul>

Easy CC License

An easy to use shortcode for inserting a Creative Commons license image or license block to your posts or pages.

Attributron 2000 vs Easy CC License