Amazon Links Pro adds relevant and contextual links to Amazon.com products to your site.
wpLinkMentor hooks into the XML-RPC interface of WordPress and adds three functions for remote management of links (blogroll) – wpLinkMentor.getLinks, wpLinkMentor.deleteLink and wpLinkMentor.updateLink.
Slimbox is a 7kb visual clone of the popular Lightbox JS v2.0 by Lokesh Dhakar, written using the ultra compact mootools framework.
Visitor Counter Widget is a simple access counter implemented as a widget.
YouTuber lets you add videos from YouTube and adjust the size of the videos to fit your blog.