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CmapTools Ontology Editor
Click here to go to the COE website
The Semantic Web Development Environment is an extensible framework for integrating new and existing tools for the Semantic Web. The toolkit, built on the Eclipse IDE includes an OWL editor with helpful features like syntax highlighting, autocompletion, and error-detection. It also currently integrates existing tools like the OWL Validator, Kazuki (OWL to Java code generator), and DumpOnt (Ontology Visualizer). Going forward, SWeDE will integrate more visualization and editing tools for Semantic Web documents and rules as well as provide extension points for translation tools, lightweight visual editors, and RDF models.
SWeDE - SWeDE 2.0.2
The Protégé Ontology Editor and Knowledge Acquisition System
The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors. Protégé ontologies can be exported into a variety of formats including RDF(S), OWL, and XML Schema. (more)
an API for reading, processing and writing RDF data in XML, N-triples and Turtle formats; an ontology API for handling OWL and RDFS ontologies; The Jena Framework includes: a rule-based inference engine for reasoning with RDF and OWL data sources; Welcome to the Apache Jena project! Jena is a Java framework for building Semantic Web applications.
Jena Semantic Web Framework
RDQLPlus » Home
RDQLPlus is a tool for querying RDF graphs, featuring graphical results in a zoomable user interface (ZUI). It can work with existing RDF files, Jena2 RDF databases, and a native-Java database called Mckoi (included). RDQLPlus does its job by interpreting commands written in a simple command language, called RIDIQL .
RSSOwl - A Java RSS / RDF / Atom Newsreader | May the owl be wit
With the same mechanism, you can even install additional languages into RSSOwl. Find the list of additional languages from Tools | Language | Download Additional Languages . RSSOwl is based on a platform that can easily be extended with additional functionality. We provide some add-ons that are worth mentioning here.
IsaViz is a visual environment for browsing and authoring RDF models represented as graphs. It features: a 2.5D user interface allowing smooth zooming and navigation in the graph
IsaViz Overview



