Adds a [callback] shortcode that can trigger PHP code so you can insert custom/complex things into your pages/posts.
Simplest plugin that injects any code into footer of a web page.
Manage, Track and Report the Advertising Campaigns and Banners on Your Site. Turn your WP into an Ad Server!
Easily insert images and photos into your blog posts! ImageInject searches the huge Flickr database for creative commons photos related to any topic.
Injects any adverts (e.g. AdSense) into the WordPress posts or widget area. Restrict who sees ads by post length/age/referrer or IP.