three different visual representations of del.icio.us tag sets that allows users to browse, search & select tags, as well as viewing posts matching them. spacenav represents tags as circular nodes, of which the size depends on the number of bookmarks the tag holds. tagscloud is similar to the well-known tagcloud textual overview, but dynamically shows related tags when the user hovers over the interface. grouper visually clusters tags according to the 'most used', 'least used' & 'commonly used' (for the rest) criteria. [ivy.fr & ivy.fr(pdf)|via libraryclips.blogsome.com & informationdesign.org]