DotSpots enables anyone to update the news and blogs in real-time with dots: mini-blog posts, including videos, pictures, documents and links.
The plugin performs an analysis of your post text and suggests tags for you.
This wordpress plugin allow you to add webslices to your blog.
wp-RDFa brings the semantic Web to WordPress
This plugin allows your readers to add tags to your posts (like Flickr or del.icio.us).
RSS link for this tag.