Feedbro is a tree-based feed reader with folders and drag & drop support. Can have unlimited feeds… Highly recommended.
If you don’t know what a feed reader is… In simple terms, it allows a user to keep track of many different websites in a single news aggregator. For example, I have a couple hundred feeds from news sites, tech sites, shopping sites, etc… that download up to the minute information into my feed reader where I can consume and quickly browse a large volume of information in one place. In my case, I use Feedbro as my feed reader.