JoomRSS is the best
Joomla RSS Feed Syndicate Extension – not only create ultimate RSS Feed for Joomla Content Articles but for any 3rd-party Joomla Extensions such as K2, ZOO, FLEXIcontent, VirtueMart, DocMan, JEvents. Other killer feature is creating Joomla RSS Feed in many formats: RSS, MRSS, ATOM, JSON, HTML or Google XML Sitemap.
This Joomla RSS Feed Creator Extension is…