Felipe Lavín

This plugin adds an editor button that will let you use the great <a href="http://codemirror.net" rel="nofollow ugc">CodeMirror</a> editor to edit the HTML code of your posts.
This editor supports code coloring and automatic tag closing on a big editor that will let you write beautiful code on your WordPress posts.
Probably the best choice if you need to use complex HTML on your posts, or just enjoy writing in plain HTML.

CodeMirror for Post Editor

Write beautiful HTML code using the CodeMirror component for your WordPress posts.

Japa Alekhin Llemos

Easy Content Templates is a plugin for WordPress that lets you define content templates to quickly apply to new or existings posts and pages. By default, templates are private to the author/creator only. Templates can be shared to other users by checking the “Make this Template available for others” checkbox. Other users can’t edit your template, they can only use it.
<a href="https://alekhin.llemos.com/easy-content-templates" title="Easy Content Templates WordPress Plugin by WP Solutions" rel="nofollow ugc">Visit plugin site »</a> 
<a href="https://alekhin.llemos.com/easy-content-templates#donate" title="Support the development of Easy Content Templates" rel="nofollow ugc">Support development »</a>

Easy Content Templates

This plugin lets you define content templates to quickly and easily create new posts or pages.

CodeMirror for Post Editor vs Easy Content Templates