Collustra is a web-based environment for exploring SPARQL-enabled triple stores. It uses standards endorsed by the W3C, including the Resource Description Framework (RDF), the RDF Schema (RDFS), and the Web Ontology Language (OWL) for interacting with class and property descriptions. Queries are modelled using the SPARQL Inference Notation (SPIN) and are executed using the SPARQL Protocol and RDF Query Language (SPARQL).