And RSS! Fortunately it's still going strong and making so much information, even in the form of podcasts, accessible to all.
For reference he was the 11th listed author among 12 for RSS version 1. I’m sure he has some contributions but he was not the main inventor of it.
And RSS 1.0 was a RDF-based reformulation of the XML-based RSS 0.91 from Scripting News/Dave Winer. That in turn was a fork of the XML-based RSS 0.91 from Netscape, which itself was a reformulation of the RDF-based RSS 0.9 from Netscape by Danny Libby and Ramanathan Guha.