Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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Zod
TypeScript-first schema validation with static type inference and zero dependencies.
postcss
A CSS transformation engine that parses styles into an AST, letting JS plugins lint, prefix, and rewrite CSS — the foundation beneath Autoprefixer, Tailwind, and 200+ other tools.
Sass
The reference Dart implementation of Sass, the mature CSS preprocessor that compiles SCSS and indented syntax to standards-compliant CSS.
undici
A fast, spec-compliant HTTP/1.1 client for Node.js, built from scratch with zero runtime dependencies
Ajv
The fastest JSON Schema validator for Node.js and the browser, compiling schemas straight into executable validation code.
urllib3
A powerful, user-friendly HTTP client for Python with thread-safe connection pooling, TLS verification, and retry handling.
proxy-agent
Maps HTTP, HTTPS, SOCKS, and PAC proxy protocols to the correct Node.js http.Agent implementation automatically.
Prisma Client
Auto-generated, type-safe database client for Node.js and TypeScript.
@clickhouse/client
The official TypeScript client for connecting Node.js applications to ClickHouse over HTTP.
zod-to-json-schema
Converts Zod validation schemas into standard JSON Schema, ready for OpenAPI, OpenAI, and JSON Schema draft 7 consumers.
jsonschema
The reference implementation of JSON Schema validation for Python, supporting every draft from 3 to 2020-12.
Fastify
A fast and low-overhead web framework for Node.js, built around schema-based validation and a plugin architecture
http-proxy-middleware
The one-liner Node.js proxy middleware for connect, express, next.js, hono, and more.
Effect
A TypeScript library and ecosystem for building robust, type-safe, concurrent applications with a full functional effect system
forge
A native, pure-JavaScript implementation of TLS and PKI cryptography for building crypto-based Node.js and browser apps.