The Kotlin Programming Language.

The Swift Programming Language

The Dart SDK, including the VM, JS and Wasm compilers, analysis, core libraries, and more.

A modern and intuitive terminal-based text editor

Flutter makes it easy and fast to build beautiful apps for mobile and beyond

Pony is an open-source, actor-model, capabilities-secure, high performance programming language

Empowering everyone to build reliable and efficient software.

iTerm2 is a terminal emulator for Mac OS X that does amazing things.

Clojure to JS compiler

The official repo for the design of the C# programming language

A library for writing unit tests in Dart.

a fast, scalable, multi-language and extensible build system

An incremental parsing system for programming tools

EOLANG, an Experimental Pure Object-Oriented Programming Language Based on 𝜑-Calculus

dmd D Programming Language compiler

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

The Julia Programming Language

The Go programming language

Ace (Ajax.org Cloud9 Editor)

Box2D is a 2D physics engine for games

Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)

👨‍🚀 buzz, A small/lightweight statically typed scripting language

Flexible level editor

Chez Scheme

The Crystal Programming Language

The Racket repository

Open Source HTML5 Puzzle Game Engine

A fast and lightweight native programming language

Elixir is a dynamic, functional language for building scalable and maintainable applications

Parallel OS, with GUI, Terminal, OO Assembler, Class libraries, C-Script compiler, Lisp interpreter and more...