GraphicEdit

This plug-in allows you to create and place a GitHub css3 badge to your webpage on wordpress. With the help of this plug-in you create a css3 badge for your users or followers helping them to follow your GitHub account. This plug-in is very useful for GitHub users, for users who would like to promote his/her GitHub on WordPress.
Links: <a href="http://graphicedit.com/" rel="nofollow ugc">Author Homepage</a>

GitHub Badge

This plug-in allows you to create and place a GitHub css3 badge to your webpage on wordpress. With the help of this plug-in you create a css3 badge fo …

digitalpoint

The Shortcode Callback plugin allows you to use a [callback] shortcode to execute arbitrary PHP code wherever the shortcode is used.
Usage
Execute someFunction() and insert whatever it returns with the following shortcode: 
 [callback function=”someFunction”]
Example shortcode to include a PHP file (the path is relative to WordPress’ ABSPATH), then insert the results of someFunction() where you used the shortcode: 
 [callback include=”custom/filetoinclude.php” function=”someFunction”]
Shortcode example that includes a PHP file (the path is relative to WordPress’ ABSPATH), then passes a paramter to someFunction() and returns the results where you used the shortcode: 
 [callback function=”someFunction” include=”custom/filetoinclude.php” param=”something”]
The format to call a class/method with the shortcode is exactly the same as above, except you specify the class::method in the “function” attribute of the shortcode. 
 [callback function=”someClass::someFunction” include=”custom/filetoinclude.php” param=”something”]
There is an example (with PHP code) <a href="https://wordpress.org/plugins/shortcode-callback/faq/" rel="ugc">over here</a>.

Shortcode Callback

Adds a [callback] shortcode that can trigger PHP code so you can insert custom/complex things into your pages/posts.

GitHub Badge vs Shortcode Callback