NewsFox is an efficient 3-pane(email) style Atom/RSS feed reader
Requirements: For Firefox
NewsFox is a Browser software developed by andyfrank.com. After our trial and test, the software is proved to be official, secure and free. Here is the official description for NewsFox:
BrothersoftEditor: NewsFox is an efficient 3-pane(email) style Atom/RSS feed Reader. NewsFox allows you to group your feeds as you wish, read feed content offline, update feeds when you want, 1-click subscribe with the Firefox URL bar icon, and read other feeds while updating.