The Free Software Directory is an essential catalog of free software online, composed and maintained by countless volunteers dedicated to the promotion of software that respects your personal liberty. Tens of thousands of people visit the Directory every month to discover free software and explore the information about version control, documentation, and licensing. Adding and maintaining entries to the Directory is crucial work to give people access to free software which has only free dependencies and runs on a free OS. All of this information is also exported in machine-readable formats, making it a valuable source of data for the study of trends in free software. The Directory is powered by MediaWiki, the same software used by Wikipedia.