* [Concerto v4.1.0](https://github.com/accordproject/concerto) – Lightweight schema language and runtime for defining, validating, and serializing business data models.

* [grunt-html v18.1.0](https://github.com/validator/grunt-html) – Grunt plugin for HTML validation using the Nu Html Checker.

* [JSON Schema Validator for Go v0.7.14](https://github.com/kaptinlin/jsonschema) – High-performance Go JSON Schema Draft 2020-12 validator with direct struct validation, smart unmarshaling, defaults, multi-language errors, and a separated validation workflow.

* [TelephoneNumber v1.4.25](https://github.com/mobi/telephone_number) – Global phone number validation gem based on Google's libphonenumber library.