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Compile Ruby-inspired, statically typed Crystal programs into native executables.

Create compiled programs and reusable modules with Go's language and standard toolchain.

Generate concrete syntax trees that stay responsive while source code changes.

A dynamic programming language with an interactive development workflow and a JVM-based library ecosystem.

A terminal-native editor built around multiple selections, syntax-aware navigation, and language-server features.

Test language support through shaping behavior as well as character coverage.

An interactive programming language for technical and numerical computing.

Build apps, command-line tools, and services with Swift's compiled programming language.

Write programmable configuration with validation and generate JSON, YAML, and other output formats.

A source and web editor with built-in HTML preview, file tools and language-server support.

Turn a concise text description into a customizable diagram with the D2 language.

AI language tutor for conversation practice in 30+ languages

AI language tutor for speaking, listening, writing, and pronunciation practice in 130+ languages.

Practice with partners who are learning your language.

Build native programs with Rust and manage their packages and builds through Cargo.

Experiment with financial language models, sentiment and forecasts

A functional language and Mix toolchain for maintainable applications on the Erlang ecosystem.

Summarize files, code, comments, and blank lines across a project by programming language.

Orthography data and tools for investigating font language support.

A language-course library with personal and institutional access routes.

Usability and navigation research with local-language support

Website popups with language-specific targeting and interactive design previews.

A statically typed language and compiler toolchain for building native and bytecode programs.

A graphical Racket development environment with interactive evaluation, language selection, and debugging tools.