NFReader: Light weight RSS reader, perfect for flash drives
You won't find a ton of features in NFReader. There's no way to tag, star, or share items. You can just mark articles as read or unread. But you do to choose whether you want to use HTML or just read the plain text versions of each article.
Like any good RSS Reader, NFReader will let you import or export OPML files. So if you typically use an online RSS reader like Google Reader or Bloglines, but want to test out a desktop reader, you can export your web-based feed list and import it in a matter of moments.