The Material Design Icons of the Pictogrammers community, with their slugs mdi/<name>. They come from @mdi/svg, the package iconsauce reads them from. Each tag the community gives them is a category with a page, in the list of the categories: an icon can be in several, and the ones without a tag are in Other. The icons the community has deprecated, many brand logos among them, are only in Deprecated: better not to start using them. The search looks through the whole set, also by alias.