Farid Mia

This plugin disables the Gutenberg Editor and Gutenberg widget block. 
You can totally disable Gutenberg. After activating this plugin, the classic editor and widget will be enabled automatically.

Disable Classic Editor and Widget

This plugin disables the Gutenberg Editor and Gutenberg widget block.

Ravi A. Vadhel

Have you upgraded WordPress and stucked with the new editor? Don’t worry, Just install the Remove Gutenberg plugin and enjoy the Classic editor. Additionally, There is an option in Reading settings from you can enable/disable the feature.

If you like this plugin, please write a few words about it at wordpress.org. Your opinion will help other people.

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Remove Gutenberg

This is very light weight and perfect plugin to remove Gutenberg and restore the old classic editor. Once update the WordPress, it was like headache to manage composer and other things. Thanks to the developer to resolve my issue. :)

Perfect

Remove Gutenberg Editor and get back to old version of editor. This provides Original Classic Editor and more.

Disable Classic Editor and Widget vs Remove Gutenberg