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

Usability and navigation research with local-language 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.

Searchable language lessons organized by level and modality.

AI tool that writes cover letters in any language using large language models

Language proficiency benchmarks and practice for K-12 language programs.

Practice with partners who are learning your language.

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

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

Spanish-language social planning with brand-voice assistance and team approvals

Run a chosen command when watched files change, without tying the watcher to one language.

Audio and video language lessons with study tools.

Donation-supported language materials without registration.

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.

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.

Translate application text with Google Cloud's NMT and advanced translation services.

A BASIC IDE and compiler for building native applications with a bundled debugger, profiler, and form designer.

Define structured messages in `.proto` files and generate language-specific serialization code.