Open Journal Systems (OJS) is open source journal management and publishing software that provides a flexible workflow and user-friendly interface. It offers options for open access, delayed open access, subscriptions, and e-commerce. OJS supports a variety of content like text, audio, video, and annotations. It also integrates with tools like Google Analytics and the PKP OAI Harvester. OJS is part of a broader set of open publishing solutions from the Public Knowledge Project.