Newzsearch - Searchable archive of Usenet binary content, also provides nfo files.
NNSeek - A web interface with a search engine for text only newsgroups. Doesn't support threaded view.
Usenet Address Database - Search for e-mail addresses if you know the name of a person, or the name of the organization that provides their net access. Returns the entries from addresses collected from Usenet postings between July 1991 and February 1996.
Usenet Newsgroups Activity Statistics - Lists the most popular newsgroups based on articles read or posted, bytes posted, and most significant change in number of articles.
Usenetix - Picture search engine featuring fast thumbnails, automatic grouping by series, and single-click batch download. Subscription service.
Yarchive - Norman Yarvin's personal Usenet archive. He only archives articles he finds interesting, after having classified them by topic. These articles are also available for download as compressed files.
