The  Commonwealth Legal Information Institute or CommonLII is a free legal research database covering case law, legislation and other materials from all Commonwealth countries. It includes content from a number of smaller jurisdictions that do not have their own separate LIIs and are not covered by WorldLII. 

CommonLII also holds a database of PDFs from the English Reports anthology of cases drawn from the Yearbooks and Nominate Reports of England and Wales, dating from 1220 until shortly after the foundation of the Incorporated Council of Law Reporting (ICLR) in 1865.

CommonLII is coordinated by AustLII, and is a member of the Free Access to Law movement.