Short Tips
You can find RSS news feed from the listed sites below. You need the URL of the news feed in order to configure it into your RSS portlet. To find the URL, visit the sites listed below. Then navigate to the news source page and look out for on the XML or RSS icon found in the listed websites. Click on it and read the URL off your browser’s address bar when the RSS loads. Note that most of the listed websites do not allow their news feed content to be displayed separately in WPS (don’t know why they provide RSS feeds in the first place), so be careful to read the T&C before using these feeds for production purposes.
Most comprehensive list.
Another site with comprehensive list
No RSS feeds available
List some useful feeds