About Atom:
Atom is one name for two things: It's both a new standard for developers, as well as a syndication format or "feed" for a Google Group. When a regularly updated site such as a Google Group has a feed, people can subscribe to it using software for reading syndicated content called a "newsreader." More about Atom from Blogger.com...


Feed-reading software
• Web-based:
Bloglines
http://www.bloglines.com/

• Cross platform:
BottomFeeder
http://www.cincomsmalltalk.com/BottomFeeder/

NewsMonster
http://www.newsmonster.org/

• Windows:
FeedDemon
http://www.feeddemon.com/

NewsGator
http://www.newsgator.com/


• MacOS X:
NetNewsWire
http://ranchero.com/software/netnewswire/


For more software, AtomEnabled Software:
http://www.atomenabled.org/everyone/atomenabled/