Kagi’s Small Web has added categories:
Finding great Small Web content that scratches your browsing itch can feel overwhelming, especially when the feed is a single stream that tumbles through over 30,000 featured sites. That’s why we’ve introduced categories, curated groups of topics that let you dive into the corners of the Small Web that interest you most.
The site list is available as a simple text file, but I haven’t seen if the categories are published anywhere yet.