NetHack Patch Database
Located at https://nhpatchdb.alt.org (formerly known as the Bilious Patch Database), this site provides a convenient central repository for NetHack patches. Users can upload, download, discuss, and vote on patches through the site after passing a CAPNTHLA test.
As of 03 December 2023, the patch database has been been brought back online, using the subdomain 'nhpatchdb' instead of 'bilious'.
The NetHack Patch Database is currently run by paxed.