Lexsitus is an open access online platform for learning and working with legal sources in international criminal law. Users can create reading lists and take notes while working on legal documents. It is developed by the Center for International Law Research and Policy (CILRAP) in partnership with the International Nuremberg Principles Academy, HELM Studio, and Mithya Labs in 2018. Lexsitus offers access to a variety of resources, including lectures, case law, commentary, and digests. The platform is structured around the International Criminal Court's (ICC) Rome Statute, Rules of Procedure and Evidence, and Elements of Crimes. Lexsitus's design is based on the ICC's legal practice, making it useful for both beginners and advanced users.