Download of Portable RSSOwl 1.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is categorized as Audio & Video 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. The actual developer of this free Mac application is FreeSMUG. The most popular version among the application users is 1.2.
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 software for Mac, such as Portable AbiWord, Portable Cyberduck or Portable Audacity, which might be related to Portable RSSOwl.