Samuel Wood (Otto)

Replace the smilies with the original versions from previous versions of WordPress.
Added bonus: Disables all “emoji” functionality in WordPress 4.2 and above.

Classic Smilies

I have been using this plugin and I proudly recommend to everyone.
PRO
- It improve performance by removing inline JS and reducing HTTP requests.
Cons
- Smiley images shouldn't be look dull. It could be appear clear like Original.

Thanks & Regards,
Gulshan

Very goood plugin, some improvement needed

Replace the smilies with the original versions from previous versions of WordPress.

Chris Lanphear

A very simple plugin to disable the Block Editor (formerly known as Gutenberg) and restore the classic WordPress editing experience. 
There are no settings. If Guten-bye is active, the Block Editor will be disabled for all registered post types and the original 
“Classic” editor will be used in its place.

Gutenbye

A very simple plugin to disable the Block Editor (formerly known as Gutenberg) and restore the classic WordPress editing experience.

Classic Smilies vs Gutenbye