Entourage: A component of the new Microsoft Office for Mac.
Hogwasher: A full-featured Macintosh online/offline newsreader with image viewer, thread tree display, spell checking, automatic decoding, multi-part post assembly and other cusomizable options. By Asar Corporation.
MacOSArchives.com: Archive of Macintosh Newsreader shareware for download. Includes brief descriptions and support email addresses.
MacSOUP: Shareware. A threaded newsreader which optionally handles e-mail. Can retrieve headers only, read off-line. Features include killfiles and multiple mailboxes with filters.
MaxNews: Freeware newsreader.
MaxNews: A full-featured MacOS offline newsreader client
MT-NewsWatcher: Based on the original NewsWatcher by John Norstad, with many modern improvements. By Simon Fraser.
NewsHunter: Download pictures and files from Usenet newsgroups. Supports fully threaded decoding and assembly of multi-part files. Includes utilities for handling file uploads and downloads, plus an integrated multimedia viewer.
Unison: Full-featured client exclusively for Mac OS X, with smart file grouping, live MP3 previewing, instant searching, and many other features.