A directory of ‘federated’ communities.
A list of all of the various blogging and messaging services that are connected to each other by way of ‘federation’ (e.g. Mastodon). This is impressive—user statistics and lists of smaller communities within each group. I’ve thought that the Indieweb was ‘ahead’ of the Fediverse, but it’s much easier to find each other with this kind of centralized directory.
I also generally advocate human-curated directories. But, in the case of examining the offerings of a network, this kind of entirely machine-constructed catalog makes perfect sense. A stat-based and rather spreadsheet-like view is the whole point.