RELExO
RELExO is a tool for reasoner-aided relational exploration which supports the process of ontology evaluation and refinement. The Java-based implementation of RELExO is open source and published under the LGPL license.
Architecture

Features
- Support for exploring OWL DL ontologies
- Ontology management back-end based on KAON2
- Abstract interface for different expert implementations
- Expert team consisting of human and ontology reasoner
- Graphical user interface (GUI)
- ...
