Scorpion [OCLC Research - Software] automatic document classifier, uses "RDF Topic Maps" (not the same model as XTM)

Requirements for Busy Sponge sounds like a job for Ideagraph!

Software for Creativity & Idea Generation Software for Creativity & Idea Generation

Notation3: A Rough Guide to N3 - another great write-up from Sean B. Palmer, once again filling a gaping hole (his last such opus was on using RDF with HTML). Maybe I'll get around to learning it now...

KTweb "KTweb brings together the European projects and people working in information access and knowledge technologies - in research, academia and business - and offers information and resources in these domains at a global level."
// must pick up the newsfeed somewhere

Semantic Web Advanced Development for Europe (SWAD-Europe) a mini-consortium project.

UI Patterns and Techniques: Introduction - "There's nothing new here."

The Semantic Web: 1-2-3 A great piece from Morbus Iff, with (non-RDF!) pictures -
"This resource is also known as Stupid Berry Pickers Make Idiot Jam and that fact should add suitable weight to the following declaration: I'm new to the Semantic Web. I cobbled this fair piece together in an attempt to collect my thoughts, answered questions, path-of-learning, and requisite bookmarks so that other XML hackers may follow in my footsteps."

Knowledge Management Software