RSSOwl is unmaintained and has several known vulnerabilities. The project is no longer recommended.
RSSOwl collects data from RSS-compliant sites are called RSS readers or "aggregators.
RSSOwl 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.
It's easy to configure, available in many many languages and the best of all: It's platform-independent.