I feel like there's a lot of hand-waving in this article. :-/

"No, RDF asked XML for namespaces." Source of the infamous "RDF tax" line of thought I presume

"This document presents the specification for a primitive datatype representing internationalized text that is used in both the RIF and OWL 2 languages."

Web tech archaeology at its best: Dan Brickley does a history dump on the origins of RDF.

"The idea of a general-purpose data model is a snare into which many bright engineers have fallen. Any data model which claims to be able to represent everything is either completely wrong or hopelessly complex. RDF happens to be both."

RDFa moved to Recommendation status this Tuesday, October 14th, 2008. Apparently the much discussed CURIE section got rubber stamped.

"The Calais web service automatically attaches rich semantic metadata to the content you submit – in well under a second. Using natural language processing, machine learning and other methods..."

sbp does it again

Enhances collaboration via shared metadata based Web annotations, bookmarks, and their combinations. By annotations we mean comments, notes, explanations, or other types of external remarks that can be attached to any Web document or a selected part of th

Fresnel is a simple, browser-independent vocabulary for specifying how to display RDF models.

"Sparta is an Python API for RDF that is designed to help easily learn and navigate the Semantic Web programmatically. Unlike other RDF interfaces, which are generally triple-based, Sparta binds RDF nodes to Python objects and RDF arcs to attributes of th

"The Tabulator project is a generic data browser. Using outline and table modes, it provides a way to browse RDF data on the web. RDF is the standard for inter-application data exchange."

Collection of RDF tools written largely in Python by Sean Palmer

"Kowari is an Open Source, massively scalable, transaction-safe, purpose-built database for the storage, retrieval and analysis of metadata. Kowari is written in Java and licensed under the Mozilla Public License."

Web service for converting RSS / Atom / RDF / Microformats+GRDDL to HTML / ntriples / RDF / RSS / JSON / Turtle.

Low level C library for dealing with triple stores. Can be used as a backend to Redland.

Exhibit is a lightweight structured data publishing framework that lets you create web pages with support for sorting, filtering, and rich visualizations by writing only HTML and optionally some CSS and Javascript code.