Newzbot
Searchable, sorted list of open news servers.
http://www.newzbot.com/

List of Open NNTP News Servers
Collection of public servers that may carry newsgroups not supported by a given ISP's server and links to commercial ones. Includes information to decode yEnc attachments.
http://www.elfqrin.com/hacklab/pages/nntpserv.php

Disenter
List of public news servers. Search for servers carrying particular newsgroups. Provides some statistics on listed servers.
http://www.disenter.com/

Aioe.org Public News server
A public news server which allows the users to post 25 messages per day from every IP without authentication. This is a text only server.
http://news.aioe.org/

News.motzarella.org
A private project providing free access to text-only newsgroups. SSL encryption and a web gateway based on the open source NewsPortal software are available, as well as UUCP Batches on demand.
http://news.motzarella.org/

Findolin Open News Server Search Engine
Searches open news servers for a given binary newsgroup.
http://www.muenz.com/

News.tornevall.net
Provides free access to text-only newsgroups. Registration required; detailed information and statistics about the server available.
http://news.tornevall.net/

Permanently Updated List of Interesting News Servers
List of public servers maintained by Henning Weede, moderator in the German de.* hierarchy.
http://home.snafu.de/hweede/pulin.htm

Free News Servers
A partial list of public or open news servers and links to other web sites that list such servers.
http://ecalame.tripod.com/free.html

Open News Network
A network both in the technological and in the social sense. It aims to provide open, non commercial access to text based Usenet.
http://www.open-news-network.org/

Dotsrc.org: Usenet
Provides public access to local, Danish, and some international newsgroups, and closed access to Aalborg University campus newsgroups.
http://dotsrc.org/usenet/

Datemas Internet News Server
Provides free access to text newsgroups only. Registration required.
http://news.datemas.de/

Newsparrot
A collection of servers regularly tested and verified to check for the availability of newsgroups, headers, speed and posting.
http://www.newsparrot.co.uk/

Cnntp.org
Provides free access to text-only newsgroups. Registration required; server status and statistics available.
http://www.cnntp.org/

Bytemine
Provides free access to text-only newsgroups upon request.
http://news.bytemine.net/

Free Usenet News Servers
Continuously updated database of Usenet servers. Includes ability to search for servers based on newsgroups carried and results can be sorted based on various criteria.
http://www.freeusenetnews.com/

Usenet4all.se
Provides free access to text newsgroups only. Registration by sending an empty e-mail required.
http://www.usenet4all.se/

Albasani.net
A private project providing free access to text-only newsgroups. Registration required.
http://www.albasani.net/

Links and FAQ about Open Nntp Servers
A document covering various aspects of open news servers, including a list of available ones. Maintained by Sebastien Willemijns.
http://80.247.230.136/nntpeng.htm

Netfinity
Provides free access to text-only newsgroups and a Web gateway is also available. For technical reasons and to avoid abuse, the server can be accessed only from certain Internet Access Providers listed on the site.
http://www.netfinity.fr/