Corese is a Semantic Web Factory that implements W3C recommandations such as RDF, RDFS, OWL RL, SPARQL 1.1 Query and Update. It is refered as one of the reference SPARQL implementations by the W3C. It includes research results as extensions to standards such as an Inference Rule language, STTL: a Transformation Language for RDF graphs and LD Script: a Linked Data script language compatible with RDF and SPARQL. It also provides distributed federated query processing. Corese is written in Java as an open source software (Cecill-C license) on github (https://github.com/wimmics/corese) . It is available as a Java library, a graphical user interface or as a Semantic Web Server with a SPARQL endpoint. It was and is used in numerous applications and research projects (EU and ANR). It is valorized and distributed by the Mnemotix startup company (http://mnemotix.org). Inria supported Corese development during the reporting period by funding two engineers (3 person-years).