After looking in the whole web (ok, not in the whole web but a major part of it for sure) a Sitemap Generator for Google News (not the search engine) compatible with the CMS i’m currently using, i convinced myself to realize it with my fingers, so that it could be integrated with my Joomla Installation and that it could import url from Open Sef plugin.
Those who know Google News know how that site is a great resource of traffic directed to our websites. However it’s very important for a good positioning (obviously after being accepted on ‘the clan’) creating a sitemap which is conform to the rules that Google dictate at this page.
After realizing that (few code lines, a connection not so much more), I packed it, wrote the README, created a configuration file and made it available for Download. Everything is released under GPL v3 Licence.