* [Step CLI v0.31.0](https://github.com/smallstep/cli) – Easy-to-use CLI for building, operating, and automating PKI systems and common X.509, JWT, and crypto workflows.

* [ZLint v3.7.2](https://github.com/zmap/zlint) – X.509 certificate linter that checks compliance with RFC 5280 and common Web PKI requirements.