Sequoia is a consequence-based ontology reasoner that supports the SRIQ
subset of OWL 2 DL — that is, it supports all OWL 2 DL features apart from
nominals and datatypes. The system is
released under an academic license
that allows free use for noncommercial purposes.
Andrew Bate, Boris Motik, Bernardo Cuenca Grau, František Simančík, and Ian Horrocks. Extending Consequence-Based Reasoning to SRIQ. KR 2016, pages 187–196.