Makoto

Low-Key ToolBar makes the block editor toolbar less noticeable and improve block editor UX.
I think block editor toolbar is useful, but too big and too conspicuous and disturbing. 
Sure, top toolbar mode is not disturbing, but is not user-friendly.
This plugin add its own setting sidebar to block editor and You can control scale, opacity, vertical position of the block editor toolbar.
By adjusting these properteis, the toolbar will be less noticeable, and it will improve UX.

Low-Key ToolBar

This plugin makes the block editor toolbar less noticeable and improve block editor UX. You can control Scale, Opacity, Vertical Position of the block …

REALMEDIA.IL

Real Accessability plugin adds very easy to use & intuitive accessability toolbar to your website.
Real Accessability Features:
<ul>
<li>Increase font/text size</li>
<li>Decrease font/text size</li>
<li>Turn Black&White view</li>
<li>Invert website colors</li>
<li>Highlight all links with underline</li>
<li>Use more readable font (Arial)</li>
<li>Remove target attribute</li>
<li>Add role=”link” to links</li>
<li>RTL & LTR Support</li>
</ul>
Available languages:
<ul>
<li>English</li>
<li>Hebrew</li>
</ul>

Real Accessability

works great!

Real Accessability plugin adds custom accessability such as font resizer, color inverse, black & white view and much more

Low-Key ToolBar vs Real Accessability