Coen Jacobs

Adds a custom post type that can be easily inserted at multiple spots, including widgets. Easy way to create WYSIWYG widgets.
This plugin is still alive. It has been tested to run on the most recent WordPress version and it still works fine. Future versions will bring more features and an updated code base.
Please use the <a href="https://wordpress.org/support/plugin/smart-wysiwyg-blocks-of-content" rel="ugc">support forums</a> to request support in case you have some kind of trouble. You can contribute to the plugin via the <a href="https://github.com/coenjacobs/smart-wysiwyg-blocks-of-content" rel="nofollow ugc">GitHub repository</a>. Pull requests or bug reports are very welcome there.

Smart WYSIWYG Blocks Of Content

Adds a custom post type that can be easily inserted at multiple spots, including widgets. Easy way to create WYSIWYG widgets.

scribu

Jotschi

Front-end Editor is a plugin that lets you make changes to your content directly from your site. No need to load the admin backend just to correct a typo.
It makes the same <a href="https://codex.wordpress.org/Roles_and_Capabilities" rel="nofollow ugc">capability</a> checks, so that if a user isn’t allowed to edit something in wp-admin, they aren’t allowed to edit it in the front-end either.
You can edit posts, pages, custom post types, comments, widgets and many <a href="http://github.com/scribu/wp-front-end-editor/wiki/List-of-editable-elements" rel="nofollow ugc">more elements</a>.
Goals:
<ul>
<li>save as many trips to the backend as possible</li>
<li>compatible with any theme, out of the box</li>
<li>light and fast</li>
</ul>
Support and development:
<a href="https://wordpress.org/support/plugin/front-end-editor" rel="ugc">Support</a> is handled by the lovely <a href="https://wordpress.org/support/profile/designsimply" rel="ugc">designsimply</a>.
I am not developing the plugin anymore; only applying the patches that other people send via <a href="https://github.com/scribu/wp-front-end-editor/" rel="nofollow ugc">Github</a>.
Credits:
<ul>
<li><a href="http://aloha-editor.org" rel="nofollow ugc">Aloha Editor</a> for the fantastic WYSIWYG editing component</li>
</ul>
Links: <a href="http://github.com/scribu/wp-front-end-editor/wiki" rel="nofollow ugc">Documentation</a> | <a href="http://scribu.net/wordpress/front-end-editor" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Front-end Editor

Edit content inline, without going to the admin area.

Smart WYSIWYG Blocks Of Content vs Front-end Editor