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Language courses with audio, conversation and pronunciation practice.

American-English lessons, pronunciation material and podcasts.

Chinese courses from introductory pronunciation to advanced study.

A browser-based Dart and Flutter workbench for running small programs and UI samples.

Pattern references and comparisons for interface decisions

Describe Ruby behavior with executable examples, expectations, and test doubles from the RSpec libraries.

Turn Gherkin behavior examples into executable acceptance checks for PHP applications.

Tailwind component examples for application and marketing layouts

Practical setup, knowledge and examples for accessible interfaces

UX case studies, examples and structured learning paths

Trace photographic and film colour processes through documented examples.

See typefaces identified in real website examples.

A Silicon Labs IoT development environment that installs protocol SDKs and generates projects for preferred toolchains.

A focused math solver with examples and reference links

Math input with worked examples across several subjects

Tools to transform data, generate examples, and fine-tune models.

AI tool that builds interactive lessons from prompts and content

AI language app that focuses on spoken practice with the Speak Tutor.

A Python property-based testing library that generates inputs to challenge the properties your code should preserve.

Use one API key to access data APIs across finance, technology, places, text, and more.

Build interactive terminal interfaces in Rust with reusable widgets and responsive layouts.

Experiment with financial language models, sentiment and forecasts

Turn an OpenAPI description into interactive reference docs and a collaborative developer hub.

Creates API and integration regression tests from API specifications or recorded application traffic.