V1:
Ontology is the philosophical study of existence. Object-oriented ontology ("OOO" for short) puts things at the center of this study. Its proponents contend that nothing has special status, but that everything exists equally—plumbers, DVD players, cotton, bonobos, sandstone, and Harry Potter, for example. In particular, OOO rejects the claims that human experience rests at the center of philosophy, and that things can be understood by how they appear to us. In place of science alone, OOO uses speculation to characterize how objects exist and interact.

V2:

Ontology is the philosophical study of existence. Object-oriented ontology ("OOO" for short) puts things at the center of this study. Its proponents contend that nothing has special status, but that everything exists equally—plumbers, cotton, bonobos, DVD players, and sandstone, for example. In contemporary thought, things are usually taken either as the aggregation of ever smaller bits (scientific naturalism) or as constructions of human behavior and society (social relativism). OOO steers a path between the two, drawing attention to things at all scales (from atoms to alpacas, bits to blinis), and pondering their nature and relations with one another as much with ourselves.

Semantic MediaWiki (SMW) is an extension to MediaWiki, that allows for annotating semantic data within wiki pages, thus turning a wiki that incorporates the extension into a semantic wiki. Data that has been encoded can be used in semantic searches, used for aggregation of pages, displayed in formats like maps, calendars and graphs, and exported to the outside world via formats like RDF and CSV.

We want to make all the world's content more accessible, interoperable and valuable. Some call it Web 2.0, Web 3.0, the Semantic Web or the Giant Global Graph - we call our piece of it Calais.

Calais is a rapidly growing toolkit of capabilities that allow you to readily incorporate state-of-the-art semantic functionality within your blog, content management system, website or application.

Just for kicks. Themes: semantic web (e.g. linked data, conversational interfaces — though these are considered to be web 4.0 by some?), metaverse (a.k.a. living in the ether/augmented reality), brain-computer interfaces(!)

Linked Data is about using the Web to connect related data that wasn't previously linked, or using the Web to lower the barriers to linking data currently linked using other methods. More specifically, Wikipedia defines Linked Data as "a term used to describe a recommended best practice for exposing, sharing, and connecting pieces of data, information, and knowledge on the Semantic Web using URIs and RDF."

RT @newsycombinator: Arbor.js - HTML5 graph visualization library