Amazon Express allows you to easily insert Amazon Associates links and Amazon product images, including images of book covers, into your WordPress posts.
YoutubeNails creates a dynamic gallery of thumbnails of each post with YouTube videos displayed on the content linked to the post permalink.
CleanCodeNZ Exclude Pages allows you to define the custom field to be attached to a page to be excluded from navigation and(or) search results.
DukaPress is an open source and free to use e-commerce platform.
Easy ReTweet is a WordPress Plugin which lets you add retweet or Tweet this buttons for your WordPress posts, together with the retweet count.
Simple Footnotes allows you to create simple, elegant footnotes on your site. Use the [ref] shortcode and the plugin takes care of the rest.
Twitter Avatar Reloaded adds a new field to the comment form for the user’s Twitter username and uses it to replace the Gravatar with their Twitter avatar.