pRSSreader
Formats
pRSSreader can handle many versions of feeds: RSS 0.90, 0.91, 0.92 and 2.0, RDF 1.0 and Atom 0.3.
Site Manager
Site manager allows you to subscribe to sites you want to read. You can group your feeds into folders and you can set up feed options such as displaying on the Today screen, caching options, etc.
Items
pRSSreader can mark feed items with three states: new, unread and read. Those states are preserved between starts of pRSSreader. You can sort the feed items or you can hide already read items.
Sequential reading
Once you start reading, you can read from the start to the end without getting back to the main window to switch between items or even feeds.
Customizable
pRSSreader is quite customizable. You can set up appearance of reading dialog, change font sizes, enable clear type, set the location of cache or an external browser for viewing the whole messages and many more (see registry tweaks for more options).
Caching
pRSSreader have quite powerful caching abilities, it can cache images included within feeds, enclosures and it can also cache online pages for offline browsing. Use Cache Manager for maintaining your cached content. You can delete whole cache as well as single files - see more (from 1.3.0).
Import/Export
You can import your OPML file from the Internet or from your local file system as well. pRSSreader can also export your OPML file.
Updates
You can update your feeds manually or you can also let pRSSreader to update your feeds automatically, periodically, (you set the update interval).
Today screen
pRSSreader has integration with Today screen. It can simply display the number of new/unread items or can cycle feed names or even items from a feed.
Summary View
The summary view shows you the number of new/unread/total items in your feeds. You can also use it to switch between your feeds very quickly. Keywords You can enter a list of keywords and pRSSreader will show you feed items that includes those keywords (from 1.3.0).
Proxy Support
pRSSreader supports HTTP, SOCKS4 and SOCKS5 proxy servers (from 1.3.0).
HTTP Authentication
pRSSreader can access HTTP pages protected with Basic or Digest authentication (from 1.3.0).
Localization
pRSSreader is localized into Czech, Dutch, French and Spanish language (from 1.3.0).
Developer Page:
http://code.google.com/p/prssr/