RSSOwl 3.7 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. RSSOwl for Mac belongs to Internet & Network Tools. This free software for Mac OS X was originally designed by The Eclipse Foundation. We recommend checking the downloaded files with any free antivirus.
From the developer:
RSSOwl is a GUI desktop client (using SWT as fast graphic libary) that reads the RSS format from a URL or a local file. It is divided into 4 areas: RSS Management includes quickview of an RSS feed, adding new RSS favorites to a category, adding new categories, deleting an RSS feed or a category, and fulltext searching with result highlights. RSS Favorites shows all the saved favorites in the different categories in a tree.
You may want to check out more software for Mac, such as Portable RSSOwl OS X or Portable RSSOwl, which might be similar to RSSOwl.
RSS Tools