Sage

RSS has become one of the most popular ways of reading news, blogs, forums etc. It's a file format that's based in XML, and it's grown enormously in recent years.

There are tons of applications that offer support for RSS feeds, but Sage definitely stands out among them. Sage is incorporated into your Mozilla web browser as an add-on that lets you read all the news and content immediately.

Sage lets you manage your subscriptions to all your favorite feeds. It also displays all this content right in your Internet browser, so you don't have to visit each site separately.

Sage is integrated in Mozilla's bookmark menu, and lets you export and import OPML lists. Plus, it supports more than 20 different languages, including Spanish.