John Godley

Sniplets is a generic text insertion plugin with support for an extensible processing framework. At it’s simplest this means you can dynamically replace text in your posts with text that may be defined elsewhere, or created by some other module. For example, you can use Sniplets to perform syntax highlighting of files, execute custom PHP code, insert data from a database, and perform all manner of other useful tasks within a standard interface.
<ul>
<li>Replace tags in a post with pre-defined text</li>
<li>Apply processing functions to the pre-defined text to perform additional functionality</li>
<li>Automatic insertion – data can be made to automatically appear in various places (header, footer, before post, after post, more tag, initialization)</li>
<li>Custom processors can be written by the user</li>
<li>Fully localized</li>
</ul>
Sniplets is available in:
<ul>
<li>English</li>
<li>Belorussian thanks to Marcis Gasuns</li>
</ul>
<h3>Documentation</h3>
Full documentation can be found on the <a href="http://urbangiraffe.com/plugins/sniplets/" rel="nofollow ugc">Sniplets</a> page.

Sniplets

Sniplets is a generic text insertion plugin.  Use it to manually or automatically insert data, PHP, syntax highlight, and almost anything else!

vlad.olaru

pixelgrade

George Olaru

With <a href="https://github.com/pixelgrade/pixcodes" rel="nofollow ugc">PixCodes</a> you can have a shortcode insert interface.
The awesome part is that you can filter any shortcode parameters or overwrite any shortcode template with your theme.
Note: this plugin does not add any style to the output of shortcodes.
We believe that shortcodes functionality should be offered by a plugin and the style should be provided by themes.
Here is a <a href="http://github.com/pixelgrade/pixcodes/blob/master/README.md" rel="nofollow ugc">detailed documentation</a> about how you can configure some plugin settings and output.

PixCodes

PixCodes offers you a nice interface to add shortcodes into editor.

Sniplets vs PixCodes