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Derive page backgrounds and gradients from the images they surround.

Generate a configurable set of separated category colours.

A pixelated 22-pixel icon family for small displays and retro interfaces.

Build colour tools with JavaScript objects, conversions and gamut controls.

Animate colour gradients on a web canvas with configurable states.

Mobile-style interface components for working app prototypes

Parse flexible colour input and generate conversions, adjustments and harmonies.

Compare colour pairs interactively or check a complete palette in code.

JavaScript learning through articles, courses and discussion

Record and schedule browser tests for web flows without writing the test steps by hand.

Deploy serverless JavaScript, TypeScript, Python, or Rust code to Cloudflare's edge network.

Read calendars and create or update events through Google Calendar's REST API.

A JavaScript font engine for glyph layout, paths and PDF subsets.

Run gray-box end-to-end tests against React Native apps on iOS and Android.

An open-source service-virtualization tool for replacing network dependencies with configurable test doubles.

Build a JavaScript colour picker from modular interface controls.

Add a configurable colour and opacity picker through a web input attribute.

Add a customizable shopping cart to an existing website

A JavaScript font parser and writer with glyph and path inspection.

Edit plain-text and source files on macOS with syntax highlighting, encoding tools, scripting, and regex search.

Use colour schemes and colour-space operations in D3 projects.

Combine website logs and browser tracking in a reporting platform with hosted and on-premise options.

Build a resizable colour picker with optional fields and alpha controls.

Inspect website structure and technical SEO in a Windows or Mac desktop crawler.