Highlight your Syntax in Simple way with WordPress short code
Provides an easy way to display your WordPress.org Themes, Plugins, Core tickets, and Codex contributions with handy widgets and template tags.
Lets admins create searchable, hierarchically-organized documentation. Supports Markdown and syntax highlighting for code. Requires WP MVC.
This plugin allow to apply some WordPress API's functions into your post/page content or as a widget.
Tire dúvidas e aprenda a arte milenar de programar no WordPress.org
Common functionality WordPress core should have but maybe shouldn't