Semantic web

Technology

 * W3C Semantic Web Activity
 * SPARQL - Query Language

APIs

 * Jena - A Semantic Web Framework for Java

RDF Stores

 * Berlin SPARQL Benchmark (BSBM)
 * Virtuoso - Open-Source Edition. Virtuoso is a high-performance object-relational SQL database.  Virtuoso supports SPARQL embedded into SQL for querying RDF data stored in Virtuoso's database. OpenLink Data Spaces (ODS) ODS is a new-generation Distributed Collaborative Application platform for creating presence in the semantic web via Data Spaces derived from Weblogs, Wikis, Feed Aggregators, Photo Galleries, Shared Bookmarks, Discussion Forums and more
 * Sesame - open source RDF framework with support for RDF Schema inferencing and querying
 * Semantic Web Integrator and Query Engine (SemWIQ) - RDFStats statistics monitor for SPARQL endpoints

Events

 * WOD-PD 2008 - Web of Data Practitioners Days - Vienna, Austria - Oct 22-23, 2008

Reference

 * Wikipedia Semantic Web series