One insterest commercial web for Project Management is -obviously- Project Manager. Via this post about 15 resources to build your career  and after read it, I want to highlight just a few of the ones they offer for free
- Free Project Management Templates
- Free Project Management Webinars 
- Free Project Management Training Videos 
Hope you’ll find it useful too.
 Original link removed because the site ask for it, so copy & paste this link www.projectmanager.com/15-resources-to-build-your-career.php