This plugin provides an easy way to tag embedded images with a CreativCommons license. This uses RDFa, to enable search engines finding your images even if the user filters for CC licenses.
Please leave your feature requests and bug notifications by commenting on the
plugin page as I don't read the comments here very often...
This plugin reuses code and ideas from the embedded-video-with-link plugin by Stefan Heß (jovelstefan).
Copy the subfolder "image-licenser" with all included files into the "wp-content/plugins" folder of WordPress. Then go to the menu "Administration" > "Plugins" and activate it.