We've built a free link generator (http://www.urx.com/about/urx_links http://www.urx.com/about/urx_links) that helps expose schemas for apps that we know about.

We've built a free link generator (http://www.urx.com/about/urx_links http://www.urx.com/about/urx_links) that helps expose schemas for apps that we know about. Please contact us (team@) with any that we're missing. http://schemes.zwapp.com/ http://schemes.zwapp.com/ also has a ton of schemas, but is a bit unorganized and not completely reliable.