I had to follow the "launching" link to remind myself about what it is. I suppose I assumed such an index already existed but I can't really think of one that has this breadth that focuses on software development libraries.

Semi-related: "AD Management Tool" appears prominently on https://libraries.io/. On first glance it looks like a header and it's describing something for managing advertisements. On second glance it's a header and it's describing the software packages below which relate to Active Directory. On third glance, it's not a header at all -- it's an advertisement for Active Directory software.

If I'm not the only one who found this distracting, I'd recommend a clearer visual indicator for the ads or perhaps a more prominent header text for "by language" / "by license" /etc.