2005
Feedmark v1.1 - Firefox Extension
by manicAdds "Bookmark with Feedmarker" to the context menu, and a statusbar icon for subscribing to feeds with Feedmarker.
David Galbraith - Tagging and the Semantic Web
by smudie & 2 othersTagging, i.e. on-the-fly user generated keyword categorization looks like it is becoming the standard way to categorize weblog content, replacing things like fixed pre-set categories.