OSXnews
- A small, fast usenet newsreader for OS X. It is designed to look and behave like Apple's Mail program and uses it for all mail functions. Open source under BSD license.
- http://osxnews.sourceforge.net/new2/

Entourage
- Official site for the email and groupware component of Microsoft Office for Mac.
- http://www.microsoft.com/mac/products/entourage2004/entourage2004.aspx

Unison
- Full-featured client exclusively for Mac OS X, with smart file grouping, live MP3 previewing, instant searching, and many other features.
- http://www.panic.com/unison/

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.
- http://home.snafu.de/stk/macsoup/

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.
- http://www.parkersoftware.com/

MT-NewsWatcher
- Based on the original NewsWatcher by John Norstad, with many modern improvements. By Simon Fraser.
- http://www.smfr.org/mtnw/

MaxNews
- Freeware newsreader.
- http://www.maxprog.com/

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.
- http://www.asar.com/