WPBlockHub.com is a network for sharing Gutenberg Block Templates, you can create block template from your website or localhost and share on
wpblockhub.com, people will able to use your block template via
WP Block Hub plugin. This plugin doesn't provide any blocks right now, you can use your favorite
blocks plugin available free at
wordpress.org repository. you will need to add the block plugin list via meta box input fields you used to create block template, so people can install required block plugin to work on their site.
You will need to get an API key to submit gutenberg block templates on
http://wpblockhub.com, you can get your
API key from here its free and you will able to create API key after register on the site.
WP Block Hub by
http://pickplugins.com