There are some great RSS readers out there, but most of them are commercial. So, I was pleased to find Awasu, which has most of the features I've come to expect from commercial readers like Feed Demon, but is available in a free, basic edition. Awasu's free Personal Edition only allows a maximum of 100 feeds (though, one could argue that if you need more than that, it's time to prune your OPML file), but still has an elegant interface and  some powerful features, including the ability to search archived feeds and sync your feeds among multiple machines. A $29 Advanced Edition and $59 Professional Edition add more features, but chances are the Personal Edition will cover most of your feed-reading needs.