EasyRdf is a PHP library designed to make it easy to consume and produce RDF. It was designed for use in mixed teams of experienced and inexperienced RDF developers.
Sparql Query Builder is a PHP class that can be used to compose queries to XML RDF documents using SPARQL. It can compose and generate queries for sending to a SPARQL end point that can extract semantic information from RDF documents.
Curses Development Kit
Functional language style immutable collections for Java.