plg_shortcodes.zip: Joomla! Shortcode Engine ported from WordPress
shortcode_default.zip: [test] shortcode and default_shortcode.php file you can edit.
shortcode_embedpdf.zip: Embed a PDF on your website for people to read. No PDF Reader required.
shortcode_snapshot.zip: Embed a screen capture image of any web page into your content.
shortcode_tweet.zip: Add a “Tweet this” icon
shortcode_user.zip: Display logged in user attributs (name, username) and conditionally display content depending on whether a user is logged in or not. Designed for membership sites that want to hide content from non-registered users.
shortcode_youtube.zip: embed a youtube video with a single lin.e. Joomla! does NOT strip out the HTML, so this method actually works for all users.
shortcode_mailto.zip: obfuscate an email address from spam bots