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.

antonchanning

This plugin adds support for bbcode markup to wordpress, bbpress and buddypress. 
It integrates with the ‘bbPress shortcode whitelist’ plugin to provide a safe 
way of enabling BBCode without giving your users access to all shortcodes.
<pre><code>Bold: [b]bold[/b]
Italics: [i]italics[/i]
Underline: [u]underline[/u]
URL: [url]https://wordpress.org/[/url] [url=https://wordpress.org/]WordPress[/url]
Image: [img]https://s.w.org/style/images/codeispoetry.png[/img] [img=Code is Poetry]https://s.w.org/style/images/codeispoetry.png[/img]
Quote: [quote]Lorem ipsum dolor sit amet, consectetuer adipiscing elit,[/quote] [quote=NAME]Lorem ipsum dolor sit amet[/quote] [quote="NAME"]Lorem ipsum dolor sit amet[/quote] [quote author=NAME]Lorem ipsum dolor sit amet[/quote] [quote author="NAME"]Lorem ipsum dolor sit amet[/quote]
Color: [color="red"]named red[/color] [color="ff0000"]hex red[/color] [color=#ff0000]hex red again[/color]
Strikeout:[s]striked this out[/s]
Center Text:[center]center me[/center]
Computer code:[code]function HelloWorld($greet = 'World') { return 'Hello '.$greet } [/code]
Font size: [size=10]10px font size[/size]
Ordered lists: [ol][li][/li][/ol]
Unordered lists: [ul][li][/li][/ul]
List Item: [li]item[/li]
Named Spoiler: [spoiler=two plus two]four[/spoiler]
Unnamed Spoiler: [spoiler]Boo![/spoiler]
Contents appear to logged in users only: [user]This is a secret message[/user]
Contents appear to non-logged in users only: [guest]Log in to see secret message...[/guest]
</code></pre>
I have enhanced support for the [url] and [quote] tags, and added potentially 
useful css style class names in the html output of the tags, to allow for 
exciting theming potential.
For example:
<pre><code>[quote=NAME]QUOTE[/quote] 
</code></pre>
will render as:
<pre><code><div class="bbcode-quote bbcode-quote-NAME">NAME<blockquote>QUOTE</blockquote></div>
</code></pre>
Or if NAME matches the login name of a user on the system, it will render as:
<pre><code><div class="bbcode-quote bbcode-quote-user bbcode-quote-NAME">DISPLAY_NAME<blockquote>QUOTE</blockquote></div>
</code></pre>
Where DISPLAY_NAME is the display name that user. With BuddyPress installed the name 
also becomes a link to their profile page, otherwise if bbPress is installed, it becomes a 
link to their forum user page.

bbPress2 BBCode

This plugin adds support for popular bbcode forum code to posts, comments, pages, bbpress 2.0 forums and buddypress activity and group forums.

Shortcode Callback vs bbPress2 BBCode