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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dotenv
Loads environment variables from a .env file into process.env for Node.js apps.
ts-node
TypeScript execution engine and REPL for Node.js that runs .ts files directly, without a separate compile step.
cross-env
Cross-platform CLI for setting environment variables in npm scripts without worrying about Windows vs POSIX syntax.
pydantic-settings
Type-safe application settings management for Python, built on Pydantic models.
dotenvy
A well-maintained, actively developed fork of the dotenv crate for loading .env files in Rust
dotenv-expand
Expands variable references, command substitution, and encrypted values in dotenv-parsed .env files.
dotenvx
A secure, cross-platform dotenv replacement that encrypts .env files and runs any command with decrypted secrets injected — no code changes required.
config
Layered configuration system for Rust applications with strong 12-factor support
proxy-from-env
Resolves the correct proxy URL for a request by reading standard *_PROXY and NO_PROXY environment variables
Symfony Dotenv
Parses .env files and registers their values as environment variables for PHP applications
Supabase CLI
Run the full Supabase stack locally and ship migrations, edge functions, and types from your terminal.
fix-path
Fix the $PATH environment variable on macOS and Linux when your app is launched from a GUI
dotenv-webpack
A secure Webpack plugin that loads dotenv variables into your bundle while exposing only what your code actually references.
strip-json-comments
Strip comments from JSON strings so you can safely use JSONC config files.
temp-env
Set environment variables temporarily for the duration of a closure, mainly for Rust tests.
env
A simple, zero-dependencies Go library that parses environment variables directly into struct fields using tags.
django-environ
Configure Django apps with twelve-factor environment variables and URL-based settings.
dotenv-flow
Loads NODE_ENV-specific .env files with local overrides, extending dotenv with a predictable file cascade.
config
Hierarchical configuration management for Node.js apps, with environment-specific overrides and multi-format file support.
platform.js
A dependency-free JavaScript library that parses user-agent strings to identify browser, OS, device, and layout engine across almost any runtime.
envalid
Type-safe environment variable validation and cleanup for Node.js and Bun with zero runtime dependencies.
dotenv (Rust)
Loads environment variables from a .env file for Rust development and testing
Convict
Schema-driven configuration management for Node.js with built-in validation
Hatch
The modern, extensible Python project manager for builds, environments, and versioning.
