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Portable SNES emulation through official project builds

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.

Children's games, jokes, activities, listening and exploration features from Highlights.

A retro-gaming system with controller and display options

A free virtual tabletop for pen-and-paper roleplaying

A practical reference for accessible game design

Explain game age ratings, content descriptors and purchases

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

A children's app publisher offering early learning, word reading and maths games.

Interpret PEGI age and content labels

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.

A children's maths and English-language-arts game with separate parent and teacher access.

Practice with partners who are learning your language.

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

Mobile-game discovery with release and platform context

A marketplace of teacher-created learning resources, from worksheets and task cards to projects and games.

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.