Sakai LMS is an open-source learning management system designed for higher education organizations. It offers a variety of features to support online teaching, learning, and collaboration, including grading, assessments, content development, communication, and more. The system can be customized based on unique requirements and includes add-on options consisting of community-contributed tools and external integrations. The grade book includes a spreadsheet-style interface, and assignments can be created with various settings, such as peer review and group submissions. The system also includes a testing engine for creating questions.