FeedReader 2.5 Alpha 610
This is an open-source aggregator that supports all major RSS formats.
It has a small footprint and support for multiple languages. FeedReader supports all major syndication formats including RSS 0.9, 0.91, 0.92, 1.00, 2.0 plus Dublin core and Slashback extensions. It provides alerts about incoming feeds on the taskbar and caches headlines for offline viewing. It also supports proxies and allows one-click subscription of Radio Userland and AmphetaDesk feeds.