This demo presents the Cupboard online system for sharing and reusing ontologies linked together with alignments, and that are attached to rich metadata and reviews. Categories and Subject Descriptors I.2.4 [ARTIFICIAL INTELLIGENCE]: Knowledge Representation Formalisms and Methods General Terms Management,Design,Documentation More and more ontologies are being created, leading to a pressing need for better support in sharing, finding and reusing ontologies. As ontology developers, we need easy ways to make ontologies available, to deploy them and distribute them. As ontology practitioners, we need easier ways to locate ontologies, to quickly make sense of their content and to assess their quality. As ontology application developers, we need infrastructure components to explore, query and exploit ontologies, preferably without the need for large resources. There have been previous attempts in creating ontology repositories1 and other systems are currently under development2 . Cupboard...