RSSOwl Portable is a RSS & RDF newsreader written in Java using SWT as graphic library. With RSSOwl Portable it is possible to read all RSS versions (includes RDF).
RSS ("Really Simple Syndication" or "Rich Site Summary") is a document specification that gives users the power to collect and organize Web-based news and information in a more efficient manner.
Applications that collect data from RSS-compliant sites are called RSS readers or "aggregators". RSSOwl is such an application. It lets you gather, organize, update, and store information from any compliant source in a convenient, easy to use interface, save selected information in various formats for offline viewing and sharing, and much more.

The license of this software is Free, you can free download and free use this rss reader software.