* [React Hook Form v7.90.0](https://github.com/react-hook-form/react-hook-form) – Library for managing form state and validation using React Hooks.

* [Superforms v3.0.0](https://github.com/ciscoheat/sveltekit-superforms) – SvelteKit form library with server/client validation, type coercion, nested data support, and progressive enhancement.

* [conform v1.21.2](https://github.com/edmundhung/conform) – Type-safe form validation library that enhances HTML Forms with support for server frameworks.

* [International Telephone Input v29.5.4](https://github.com/jackocnr/intl-tel-input) – JavaScript plugin for entering and validating international telephone numbers with features like country detection and number formatting.

* [Validate v0.9.0](https://github.com/connectrpc/validate-go) – Connect interceptor that enforces Protobuf-encoded validation constraints at runtime using protovalidate and CEL.

* [personnummer v3.3.0](https://github.com/personnummer/js) – Swedish personal identity number validator for JavaScript, supporting coordination numbers and interim T numbers based on options.

* [env-schema v8.0.1](https://github.com/fastify/env-schema) – JSON schema–based environment variable validator with Ajv, supporting optional loading from .env files via Node.js parseEnv.

* [GoValidator v2.4.1](https://github.com/rezakhademix/govalidator) – Type-safe Golang validator that sanitizes and validates data without struct tags, type assertions, or reflection.

* [Formkit - Primevue v4.3.6](https://github.com/sfxcode/formkit-primevue) – PrimeVue-based FormKit inputs and outputs for configuration-driven forms with validation.

* [Vest vest@6.3.4](https://github.com/ealush/vest) – Declarative validations framework using a unit-test-like syntax for maintainable, framework-agnostic form validation.

* [CUE v0.18.0-alpha.3](https://github.com/cue-lang/cue) – Tool for validating data, writing schemas, and ensuring configuration compliance with policies.