Andrew Parman

This plugin adds a Gutenberg block called <code>IECST Highlighter</code>. After entering a code snippet in the editor, 
the output will be rendered with a syntax highlighting style selected in the IECST Highlighter Settings.
This plugin uses the <a href="https://github.com/PhioAutomation/phio-highlighter" rel="nofollow ugc">Phio Highlighter</a> which is distributed 
with an MIT License, https://highlighter.phioautomation.com/LICENSE.txt.
Development of this plugin is on <a href="https://github.com/PhioAutomation/phio-highlighter" rel="nofollow ugc">Github</a>.

IECST Highlighter

Display beautiful code snippets using the Phio Highlighter for the IEC 61131-3 Structured Text language

Cuamckuy

Tired to search for normal, easy to install programming code highlight plugin?
This one will help you to end this adventure.
It adds special shortcode [code][/code], keyboard shortcut «alt+c» and button to Visual Editor.
If you want do define highlight syntax language, you may use direct lang param like [code php][/code].
Plugin will also highlight <code><pre class='language-html'>…</pre></code> and <code><code class='language-html'></code></code>, if you don’t want to use shortcode.

Easy Prism Syntax Highlighter

Highlight programming code with Prism.JS script easily.

IECST Highlighter vs Easy Prism Syntax Highlighter