Wikis built with org-mode is my magic bullet with everything under version control. The major problem was that everyone needed to know both git and Emacs to contribute but this is not the case since I made a proper web client https://github.com/mickael-kerjean/filestash

Is there an org-mode editor besides Emacs that has a lower learning curve?

mickael-kerjean

Yes, my favorite is the one I built myself which look like this: https://demo.filestash.app/view/emacs.org?share=hn

It can create entire wikis by rendering documents in many formats: For example:

- HTML: https://demo.filestash.app/api/export/hn/text/html/emacs.org

- PDF: https://demo.filestash.app/api/export/hn/application/pdf/ema...

- markdown: https://demo.filestash.app/api/export/hn/text/markdown/emacs...

- txt: https://demo.filestash.app/api/export/hn/text/plain/emacs.or...

...

Also, the document shown here is coming from this github repo: https://github.com/mickael-kerjean/nuage_org_demo and the app itself is free software: https://github.com/mickael-kerjean/filestash