Required commercial (paid) software: AllWebMenus PRO (v5.3.926)
This plugin allows you to insert high quality YouTube videos and also videos in normal quality.
Allows the insertion of code to display an external webpage within an iframe.
Display links to your most 'interesting' posts, where interestingness is determined automatically by a Bayesian learning algorithm.
This plugin allows you to insert categories to pages too and not only to posts.
Twitter Status is a very simple no-fuzz plugin that gets the current Twitter message for your blog authors.
Smuggery is a free (GPL) WordPress plugin that automates integration with SmugMug services.
Yet Another Footnotes (YAFootnotes) is a plugin that gives you the ability to add footnotes to any text you are writing.
Adds Protonotes to your WP site
Forget to put manually your links, just choose a word and a URL and this plugin will replace all matches in the posts of your blog.
Manage and embed scribd ipaper documents and display it easily in your posts
Get Flickr Thumbnails plugin can get thumbnails for photos on your site that from flickr.com
Tired from folded or stretched images you wanted to fit into your theme with max-width css tag? This plugin solves the problem.
Gets a listing of Picasa Web Albums and displays album thumbnails on your page.
This plugin adds client-side validation to the WordPress comment form, using the jQuery validation plugin.