• ArchWikiArch Linux communityGFDL-1.32026-07-02Arch Linux community — One of the most complete community-maintained Linux knowledge bases, useful far beyond Arch itself.
• Blender ManualBlender Documentation TeamCC-BY-SA 4.02026-07-02Blender Documentation Team — The official Blender reference manual, openly licensed and translated by the community.
• GNU Emacs ManualFree Software FoundationGFDL-1.32026-07-02Free Software Foundation — The canonical manual of GNU Emacs — documentation that has been continuously maintained since the 1980s.
• Linux man-pagesLinux man-pages projectGPL-2.0+ and others2026-07-02Linux man-pages project — The manual pages documenting the Linux kernel and glibc userspace API — core reference of the ecosystem.
• The Debian Administrator's HandbookRaphaël Hertzog & Roland MasGPL-2.0+ / CC-BY-SA 3.02026-07-02Raphaël Hertzog & Roland Mas — The reference book for Debian administrators, freely licensed and maintained alongside Debian releases.
• The Rust Programming LanguageSteve Klabnik, Carol Nichols & communityMIT / Apache-2.02026-07-02Steve Klabnik, Carol Nichols & community — "The Book" — the official, freely licensed introduction to the Rust programming language.