RGBEx.io is the first resource which allows contract issuers to anonymously list their assets and contracts. It doesn't require any registration and operates with a public keys and signatures.
Storm is a decentralized data network created by LNP/BP Standards Association, the creators of RGB protocol. You may store your assets in Lightning network and access them in fully decentralized and censorship-resistant way.
Schemata registry run by LNP/BP Standards Association lists known schema and interfaces for RGB contracts. Schema is a "template" which simplifies creation of contracts, such that issuers do not need to learn programming.
You can learn more about governance of the different registries in our governance section.