Open source. Open possibilities.

Viv is an open-beta, source-available engine for emergent narrative in games and simulations. It provides a custom DSL, compiler, JavaScript runtime, story sifting, and editor plugins.

Zap is a general-purpose programming language with a standalone native runtime, offering clear syntax, optional typing, and built-in web capabilities without external dependencies.

Xag is a compiled programming language featuring Rust-style memory ownership, high performance focus, and detailed error messages. It compiles to native code via LLVM or runs through interpreters. Early work-in-progress with strong decimal arithmetic verification against hardware and independent references.

Modular Platform is an open-source unified platform for AI development and deployment, hosting the MAX framework and Mojo language, including compiler, standard library, accelerator kernels, and an OpenAI-compatible inference server.

A curated collection of single-file cheatsheets covering popular programming languages, backend and frontend frameworks, databases, and development tools, with a website directory and open contribution via pull requests.

SparkLang is an MIT-licensed language and runtime for plain .spark files: dry-run-first CLI, compile/bytecode dumps, IDE language ops, playbooks, model lab ops, and optional live gateway, voice, browser and CUDA surfaces.

Kotoba is a security-first, declarative language and computing stack for AI agents that enforces capability-safe execution, post-quantum cryptography by default, content-addressed artifacts, and explicit authority boundaries to confine untrusted code.

V is a simple, fast and safe compiled programming language that compiles itself in under a second with zero library dependencies. It offers C-to-V translation, hot code reloading, flexible memory management, built-in ORM and web framework, plus C and JavaScript backends.

XGo is a programming language that reads like plain English, integrating C/C++, Go, Python, and JavaScript/TypeScript. It simplifies Go syntax, supports classfiles for domain-specific friendliness, and includes frameworks for web, games, and DevOps.

kanso is a small language whose source files contain only decisions: layout, naming and declaration order are enforced by the compiler, so non-canonical code is a syntax error. The repository ships a tree-walking interpreter, an LLVM-backed native compiler and a WebAssembly backend, held byte-identical by differential CI.

NeoHaskell is a beginner-friendly Haskell dialect designed for productivity, with tooling, testing, and documentation built-in for easy app development.

Block is a local-first polyglot orchestration engine for writing multi-language workflows—Python, JavaScript, Lua, PHP, SQL, PowerShell—in single .blk files. It coordinates host runtimes, passes serializable shared state between blocks, and runs on Windows via CLI. Editions: Lite, Standard, Plus.

Official Kotlin repository: JetBrains' concise multiplatform programming language, with compiler, standard library, Gradle build automation, Kotlin/Native support, and contributor guidelines.

A curated, opinionated collection of full-stack learning resources for software engineers, covering must-read books and articles, engineering principles, and dozens of topics from algorithms and API design to security, SRE, and career growth.

Julia is a high-level, high-performance dynamic programming language for technical computing. This repository hosts the language's source code, build instructions, standard library, REPL, and links to documentation, packages, and community resources.

Promise is a statically-typed programming language designed for AI agents to write correct, maintainable code. It features explicit ownership, goroutine-style concurrency, algebraic error handling, generics, and pattern matching. Compiles natively to LLVM for Linux, macOS, Windows, and WASM.

BAML is a programming language purpose-built for AI agents, featuring a Rust-like type system, runtime type persistence, typed errors, green threads, and built-in agent tools. It can be adopted incrementally from TypeScript, Python, Go, C#, or Java.

Go is an open source programming language designed for building simple, reliable, and efficient software.

Inform 7 is a natural-language programming language for creating interactive fiction, featuring literate programming, a compiler, and tools for prototyping and digital narrative.