Protege

Protege is a free, open-source software platform used for creating, editing, and managing ontologies—formal representations of knowledge within a specific domain. It helps users define and organize concepts, relationships, and rules, making complex information structured and understandable by both humans and machines. Widely used in fields like healthcare, engineering, and research, Protege supports semantically rich data, facilitating better information sharing, reasoning, and decision-making across diverse applications.