Cyberfiber: Newsgroups Listing - - Browse or search this hierarchical topic list of Usenet newsgroups. Does not provide access to newsgroups.
Google Groups' Directory - - Usenet newsgroups and Google Group mailing lists classified by topic, language, region and activity.
Newsgroups-1 - - Categorized lists of Usenet newsgroups and Yahoo groups (mailing lists). Links to Google groups and Yahoo groups for web-based browsing of the groups.
Newsgroups Related to Network Abuse - - List of newsgroups related to network abuse. Includes a description of each newsgroup and a link to its charter. Maintained by Russ Albery.
Usenet Info Center Launch Pad - - Apparently no longer maintained, but of interest for historical reasons. Besides a list of Usenet newsgroups, also contains links to FAQs, newsgroup descriptions, and other Usenet information.