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http://genesisdeveloper.me/genesis-widget-areas-generator-plugin/ - premium $ - Chinmoy Paul

https://wordpress.org/plugins/widget-options/

How to Create a Custom Functionality Plugin (And Why You Need One)
https://www.nutsandboltsmedia.com/how-to-create-a-custom-functionality-plugin-and-why-you-need-one/?platform=hootsuite

The Best Customization Plugin for Genesis
https://www.bloxwp.com/