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The site seems to be powered by observable, somehow (I don't know much about it).  .
Something that tends to happen with this kind of list is that things die, get outdated, etc. With some machine readable data it would be possible to run some health checks, like, if the project has a git repo, check time of last commit, etc.
Would be cool to rethink sites like this and other list sites like those popular "awesome XYZ" pages, such that anyone could perform some quick queries from a command line in as few steps as possible ("show me all tools with good rating that were updated at least 3 months ago", etc).
"These reviews are for the makers of tools, those that are
pushing our computational interfaces forward. The goal of
the Whole Code Catalog is to provide inspiration for the tools you will one day create."
In such context, the classifications make sense to me.
I'm not sure that "notebook" and "reactive" are the two main features I would use to describe Eve, the one language I sort-of know on that list. I think its most distinctive characteristics were that it was synchronous and logic-programming-based (reactive might well imply synchronous, as it indeed did in the '80s and '90s, but I think these days many people think of something else when they hear "reactive" and know little about its original, fundamental aspect -- the so-called synchrony hypothesis).