It's not a catalog, but you can use the 'extension:' search option in the command bar. https://github.com/search?q=extension%3Ageojson&type=Code&ref=advsearch&

It's not a catalog, but you can use the 'extension:' search option in the command bar. https://github.com/search?q=extension%3Ageojson&type=Code&ref=advsearch&l= https://github.com/search?q=extension%3Ageojson&type=Code&re... Will give you all of the results, it definitely needs a slightly better way of searching.