Is there anything similar on the market?

Of course there is, but it is rare to find a publishing tool that has no predecessor.

Besides the fact that such a page can be developed as a custom solution (that’s how we started...) , there are several tools and plugins that can be used to create pages with a wiki-like content structure.

Perhaps the best known is Wikipedia’s engine (MediaWiki), which is free to use for wiki production, but as well as having many technological, publishing and business usability constraints, it also requires professional development and operational capacity, so its free nature is very relative.

A similar experience can be had with the various site-builder plugins available: a programmer can use them to develop a wiki, but that’s not really what they’re designed for (but if there is an app you like, send it to us, we’d be very grateful).