Jumper Search is a collaborative search engine that is powered by social bookmarking. It uses peer and social-networking principles to tag and link distributed content, media, or data to make valuable information more easily discoverable.
Tagging Manager is a tool where each user can tag website's with meta-data. Features: Template based System, RSS-output, Multiuser Language support, Archive of tagged pages, Automatic tag-suggetions based on page metadata, Taxonomy-system