Cacher is the code snippet organizer for pro developers

https://wordpress.org/support/view/plugin-reviews/wp-featherlight

http://lokeshdhakar.com/projects/lightbox2/ (I use this on ASK Design)
ASK Design website coding for the lightbox:

html 4
rel="lightbox[portart]"

html 5
data-lightbox="portart"

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http://fancyapps.com/fancybox/
fancyBox licensed under Creative Commons Attribution-NonCommercial 3.0 license.
You are free to use fancyBox for your personal or non-profit website projects.
You can get the author's permission to use fancyBox for commercial websites by paying a fee ($19).

www.frescojs.com/
$$ premium C95 (whatever that is).