drunkenslug.com - Usenet indexer providing SSL and integration for Couch Potato, Sonarr, Sabnzd and more.
Spotweb - Spotweb is a decentralized usenet community based on the Spotnet protocol.
NZBClub - NZBClub index Usenet automatically almost real-time and make it available for NZB search.
DogNZB - A newznab based Usenet newsgroups indexer. Access by invite only.
NZBgeek - A Usenet newsgroups NZB Indexer.
NZBFinder - A newznab based usenet nzb indexer.