Adam Capriola

Adds source name and URL fields for media uploads along with a shortcode for displaying image credits for all images within an entry, including its featured image.
WordPress natively doesn’t provide the ability to manage where you’ve pulled different media from, so this can be helpful in making sure you provide links back to the contents’ creators.

Image Credits

Adds source name and URL fields for media uploads along with a shortcode for displaying image credits.

ELAN42///

This plugin lets you add different kind of links into your website, 
with widgets, 
shortcodes, 
or php code.
This links will open a popup that gives the visitor more informations, 
you will be able to customize the text for privacy policy, terms and conditions, refund policy, 
you can also add a customized link for the credits of the website.

ELAN42-disclaimer

Adds configurable Credits / Privacy Policy for the European Cookies Law and GDPR, with links / ajax  / hover box.

Image Credits vs ELAN42-disclaimer