Gerkin

Create your HTML snippets or raw PHP code with this plugin. Don’t bother anymore with annoying TinyMCE HTML rules, that cleans script or styles tags. 
All users allowed to create HTML snippets are able to use also placeholdes: a small piece of text that will be replaced by the value you give to the related attribute. 
Administrator users are also allowed to embed raw PHP code that can be executed at display-time. 
Want to display the name of the current user? No problem! Display it’s IP address? Just go! Store or display session data? Hey, just do! 
Improve your editing comfort by installing <a href="https://wordpress.org/plugins/ithoughts-advanced-code-editor/" rel="ugc">iThoughts Advanced Code Editor</a>, that set up an awesome web code editor. 
It also includes a tiny TinyMCE plugin to link your HTML Snippets with your standard posts.
Enjoy the freedom of setting up everything you want in a simple embeddable custom shortcode.
For more informations, please visit the <a href="http://www.gerkindevelopment.net/en/portfolio/ithoughts-html-snippets/" rel="nofollow ugc">dedicated plugin page</a>

iThoughts HTML Snippets

Embed custom HTML snippets with raw content and variables

frisfruitig

With FF Block Gist Embed you can embed files from GitHub Gists. It adds a block named ‘Gist Embed’ to the WordPress editor interface. For every instance of this block, you can:
<ul>
<li>Select one or more files from the same Gist URL to be embedded in your post.</li>
<li>Include the vendor stylesheet that handles the styling of Gist embeds (see the FAQ for more information).</li>
<li>Choose whether or not to embed the Gist files as raw content.</li>
</ul>
<h3>Roadmap</h3>
We would like to bring some additional features soon. Some of the things we have planned, are:
<ul>
<li>Caching the content of files</li>
<li>Manually change the order of the files from a Gist within a block</li>
<li>Automatically get the list of files after a valid Gist URL is entered in the input field</li>
</ul>

FF Block Gist Embed

This block works great for adding Gists to your posts and pages.

However, it desperately need a preview option so that you can see the results in the editor.

But, otherwise, a fantastic addition for any developer wanting to share their code.

A simple but effective Gist block

A WordPress editor plugin that that handles embedding (raw) files from GitHub Gists.

iThoughts HTML Snippets vs FF Block Gist Embed