Feedreader is a lightweight open-source aggregator that supports all major RSS/ATOM formats.

Features:

• Supports all major syndication formats: RSS 0.9, 0.91, 0.92, 1.00, 2.0 plus Dublin core and Slashback extensions
• Pre-configured with hundred of quality feeds from leading syndicators such as NewsIsFree and Moreover
• Alerts about incoming feeds on taskbar
• Caches headlines for offline viewing
• Supports proxies
• Allows one-click subscription of Radio Userland and AmphetaDesk feeds
• Search support
• Multilanguage support
• OPML import and export.