The online documentation for Lotus (later IBM, later HCL) Notes/Domino is excellent. It's not purely a "site" because the documentation is a Notes database itse

The online documentation for Lotus (later IBM, later HCL) Notes/Domino is excellent. It's not purely a "site" because the documentation is a Notes database itself, but it is also available on the public Internet [1], so I think it counts. For open source projects, Django [2] is pretty close to the gold standard. [1] https://help.hcl-software.com/dom_designer/14.0.0/index.html https://help.hcl-software.com/dom_designer/14.0.0/index.html [2] https://docs.djangoproject.com/en/dev/ https://docs.djangoproject.com/en/dev/