- BlogPlanet - Allows for reading RSS/RDF/Atom-Feeds any Java-enabled mobile phone.
- CARA Perl RDF API - A pure perl RDF system providing storage and RDF/XML parsing.
- FRODO RDFSViz - A visualization tool for RDF Schema ontologies.
- ICS-FORTH RDFSuite - A suite of high-level, scalable tools for the Semantic Web. Comprises of VRP, the Validating RDF Parser, RSSDB, the RDF Schema Specific DB and an Interpreter for RQL, the RDF Query Language
- KAON Semantic Web toolkit - A Java RDF and Semantic Web toolkit with parsing, persistent storage, inferencing and querying.
- Mozquery - This tool uses ASRDF, a terse notation based on the outliner scheme, to convert RDF statements in full RDF-XML syntax with support for data typing and i18n.
- RDF API for PHP (Bizer) - A pure PHP library for parsing, manipulating and serializing RDF.
- RDF Gateway by Intellidimension - A semantic query service for distributed data. The gateway gives applications the ability to perform powerful deductive queries across multiple sources of structured data. Applications interface with the gateway through a simple, SQL-style language (RDFQL) that supports the model and syntax of RDF.
- RDFDB: An RDF Database - An implementation of a full RDF system including parsing of XML syntax, storage, model, query language and a server interface.
- RDFStore - Perl API for RDF Storage - A pure perl RDF API providing storage, querying and manipulation of RDF models and parsing of RDF/XML.
- Redland - An RDF Application Framework - A C library that provides an implementation of the RDF model, allowing it to be manipulated, queried and stored via APIS in Perl, Python, Tcl and Java.
- Rx4RDF - Information on this application stack for building RDF-based applications. Also has details on Rhizome which is a Semantic Web-enabled, Wiki-like content management system.
- Sesame: RDF Schema Querying and Storage - An RDF Schema-based Repository and Querying facility. Supports expressive querying of RDF data and schema information using an OQL-style query language called RQL. The site has demos of the storage facility and the query engine.
- W3C RDF Validation Service - A full RDF Validation Service - for use with any RDF, not just RSS 1.0
- Wilbur Lisp RDF Toolkit - A toolkit for RDF and DAML written in Common Lisp providing model manipulation and parsing of RDF/XML.
