JavaScript

Green Turtle is a RDFa 1.1 implementation written in pure JavaScript that runs in the browser.
rdfa-streaming-parser.js is a fast and lightweight streaming RDFa 1.1 parser for Node.js that also runs in the browser.

PHP

EasyRDF is a PHP library for extracting RDFa and working with RDF, in general. You must use the latest development version if you want the RDFa parser: download the latest 0.8 snapshot.

Python

PyRDFa is a Python package for extracting RDFa from Web documents; it is based on the Python RDFLib package.

Ruby

The RDFa gem for the Ruby RDF software stack.

C

librdfa is the fastest RDFa processor in the world.

Clojure

clj-rdfa is an RDFa extractor implemented in Clojure running on a Java Virtual Machine.

Java

semargl is a highly performant RDFa parser. Jena, Clerezza, and Sesame integration. Android and GAE support.

The RDFa Test Suite is useful for validating RDFa Processors against the official test suite for RDFa 1.0 and RDFa 1.1. Languages supported include HTML5, XHTML5, XHTML1, HTML4, SVG and XML.

Version and Host Language specific test manifests may be found here:

• HTML+RDFa 1.1 (HTML4) (processor graph role vocab)
• HTML+RDFa 1.1 (HTML5) (processor graph invalid html role vocab)
• HTML+RDFa 1.1 (XHTML5) invalid html (processor graph role vocab)
• SVGTiny+RDFa 1.1 (processor graph role vocab)
• XHTML+RDFa 1.1 (processor graph role vocab)
• XML+RDFa 1.1 (processor graph role vocab)
• SVGTiny+RDFa 1.0
• XHTML+RDFa 1.0
• XML+RDFa 1.0

See the RDFa Test Suite Vocabulary for information on the semantics of the test manifests.