Klezio is a new kind of News portal. it enhance top news headlines with relevant information from wikipedia, wikinews, flickr, delicious and twitter.

Klezio.com uses OpenCalais to classify RSS news and extract semantic data.

Feedzz it's a semantic feed aggregator. It crawls the most popular feeds (based on different categories), reading the post entries and auto-tagging the entries using OpenCalais. Once the user selects an entry, he/she can find out related entries using the semantic terms as connectors.The information is classified under topics, people and places.

Users can suscribe to existing feeds, submit new ones or upload OPML files. Search and semantic terms can be stored as shortcuts available in the profile page and by webmail.

Users can vote up&down,  share posts (mail and twitter) , and bookmark. posts organizing the post entries in folders.

Thomson Reuters' Content Feed Explorer provides an interface to help you easily build content feed URLs from the parameters available. This allows you to browse the feeds available as well as build the URLs you require for use within your projects. Calais provides the semantic tagging in RDF format.