Codex61 is a general-purpose web directory that maintains a public index of sites across 22 topic sections. The index is organised into specialist columns — Health and Medical, Finance, Technology, Law, Travel, and others — plus a General File for sites that span multiple areas or do not fit a single column. The directory was built on the principle that a well-organised public index has value on its own terms. Each entry in Codex61 is assigned to a section based on the primary activity of the site, not on keywords or tags. That makes browsing by section a practical way to find sites in a given field. Submissions are open and free of charge. Anyone can file a site by choosing the most relevant section and entering a URL. Entries go through a basic desk review before going live; the review checks that the site is accessible and that the section assignment is reasonable. Codex61 does not endorse any listed site. Inclusion in the index is not a recommendation, and the index makes no representations about the accuracy, quality, or fitness of any listed resource. Users are advised to conduct their own assessment before relying on any site found here. The index is updated on a rolling basis as submissions clear the desk review. The current filing spans 836 active entries across 22 sections. If you operate or know of a site that should be in the index, use the submission form to file a listing.