Kosteg

Newsletter HTML Generator plugin extracts title, teaser (or excerpt), author name, featured image, permalink, shortlink, date from current post and generates full HTML-code of ready to send newsletter based on the templates you provide. You just copy and paste the final HTML-code in your favorite newsletter sending service like Mailchimp, GetResponse, Campaign Monitor, etc.
<h3>How does it work?</h3>
The plugin makes custom post type “Email Templates”. 
1. First, you create as many templates as you need (for example “Mailchimp responsive”, “Weekly newsletter”, etc). You can get templates from newsletter service or design your own. 
1. After that you open any of your regular posts in edit-mode, and choose any Email template you created before. The plugin instantly generates ready-to-send HTML-code using the post’s title, teaser, etc. You also get the plain-text version of your newsletter – just in case.
The plugin doesn’t send newsletter, doesn’t create signup forms, doesn’t segment your subscribers! It only generates ready to send HTML you can use with ANY Email service provider or Email marketing service.

Newsletter HTML Generator

Generates HTML-code of ready to send newsletter using title, teaser, image, etc from your post and templates you provide

This plugin will add simple sticky notes in the WordPress admin bar.
The recorded snippets on this notes will be able to utilize across the each management screen.
Of course, if you enable the admin bar, it can also be used in the WEB frontend.

Custom Sticky Notes

The current version of this plugin, over a year old, has prohibited plugin behavior.
It ends up loading versions of jQuery or jQuery components directly from Google, which is breaking some other plugins that rely on the current standard version of jQuery from WP.

Current Version has Bad Behavior

Add simple sticky notes in the WordPress admin bar.

Newsletter HTML Generator vs Custom Sticky Notes