Jason

No fancy, complicated syntax highlighting here. The goal of this plugin is to allow your bbPress users to post code snippets in their forum topics and replies without having to learn anything new. Basically, any raw HTML/PHP posted within <code><pre></code> or <code><code></code> tags will automatically be converted and displayed in the forum as you’d expect it would.
And additionally, anything posted within <code><pre></code> tags will be automatically escaped from bbPress applying wpautop. This will allow for your forum users’ code snippets to keep their whitespace as they intend.

bbPress Code Snippets

Automatically display HTML/PHP code posted in bbPress topics and replies.

Alexandru Vornicescu

This is a WordPress plugin that will add a “pre” tag functionality to your WordPress editor.
Paste your code first, select it and press pre button from the editor’s toolbar in Text Mode.
Selected text will get formatted and specific pre tags will be added.

pre Tag For WP Editor

This WordPress plugin will help you add pre tags into wp_editor.

bbPress Code Snippets vs pre Tag For WP Editor