The followingoutline is provided as an overview of and topical guide to free software and the free software movement:
Free software –software which can berun, studied, examined,modified, andredistributed freely (without any cost). This type of software, which was given its name in 1983, has alsocome to be known as "open-source software", "software libre", "FOSS", and "FLOSS". The term "Free" refers to it beingunfettered, rather than being free of charge.
Free and open-source software packages (by type)