Portable RSSOwl OS X 1.2 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. The most popular version among Portable RSSOwl OS X for Mac users is 1.2.
The actual developer of this free Mac application is FreeSMUG. The program belongs to System Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Portable RSSOwl OS X is the binary distribution of the RSSOwl RSS, RDS, Atom newsreader for Mac OS X packaged as portable application so you can take all your favorite newsfeeds with you.
You may want to check out more Mac applications, such as Portable RSSOwl, Portable AbiWord or Portable Audacity, which might be similar to Portable RSSOwl OS X.