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Testing Tool for DID and VC: https://github.com/transmute-industries/api.did.actor
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VC Extensions
OpenBadges3.0 specific: https://imsglobal.github.io/openbadges-specification/ob_v3p0.html
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All implements use case Diploma https://ec.europa.eu/digital-building-blocks/wikis/display/EBSIDOC/Diploma+Functional+Scope
Verifiable Credentials wallets:
https://info.jff.org/hubfs/Digital Wallet Market Scan/Market-Scan-Digital-Wallet-040122-vF.pdf