The following resources appear to be licenced under the GNU Free Documentation License, and are therefore available to be used as resources for Wikipedia articles as long as the source is attributed.
- Japanese History Documentation Project at http://www.openhistory.org/jhdp/
- The Trinity Atomic Web Site at http://nuketesting.enviroweb.org/index.html
- The Introduction to Computer Programming at http://www.isd197.org/sibley/cs/icp/
- The Linux Systems Administrators Guide at http://people.debian.org/~bagpuss/sag/
- Planet Math at http://planetmath.org/, see http://planetmath.org/?op=license
- Stephen J. Ramsay's dissertation, "Algorithmic Criticism" at http://busa.village.virginia.edu/algocrit/diss/diss.html
- "Sun, Surf and Sandstone; A Rockclimber's Guide to Sydney" at http://www.sydneyclimbing.com/
- The Open Theory project at http://www.opentheory.org/open_theory/?lang=en (mostly German language
- The Association for Progressive Communications' "Participating With Safety; A series of briefings on information security and online safety for civil society organisations" at http://secdocs.net/manual/lp-sec/
- The Dorando game emulator database website at http://dorando.emuverse.com/html/copyright.html
Please merge the following list:
- Simple Science Wiki: created to produce a science hypertext book for secondary education. Covered under the GNU FDL.
- The Anarchist FAQ: Under GNU Free Documentation License. Contains much information on anarchism, but be careful, because a lot of it is biased towards a particular viewpoint.
- Free Online Dictionary of Computing was originally published under a license which required acknowledgements and was therefore not compatible with GFDL. Has recently been relicensed under GFDL and can be used by us. See Free On-line Dictionary of Computing/Status to help with importing articles.
- Planet Math: A collaborately developed math encyclopedia, under the GNU Free Documentation License.
- Nupedia.com: Read about adding Nupedia articles to Wikipedia.
- This Google search attempts to find documents with GFDL license grant boilerplate.