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An interactive programming language for technical and numerical computing.

Continuously fuzz accepted open-source projects to find crashes and other input-handling bugs.

Apple's framework for unit, performance, and UI tests in Xcode projects.

Build composable Python command-line interfaces from decorated functions.

Raster repeat drawing with textile density and palette preparation tools

Run JavaScript outside the browser for servers, command-line tools, and application scripts.

A browser IDE for programming courses, with Linux project environments and an integrated terminal.

A beginner-focused BASIC IDE with instant graphics, a step debugger, and a browser-based WebAssembly edition.

Quick drawn boards with dialogue, timing and animatic exports

Free public-domain artwork images from the National Gallery of Art

A Java IDE that lets learners explore classes and objects while writing code.

Shopify loyalty, referrals and account tools with configurable rewards

Affiliate programs with referral portals and flexible commission rules

Deploy and evaluate controlled SEO experiments across groups of website pages.

A creator marketplace where brands publish collabs and review applications

Manage projects and workflows on configurable boards with team views, templates, and automations.

Use cryptographic libraries and command-line tools to work with TLS, certificates, and related standards.

Compile suitable Python numerical functions to machine code when they are first called.

Convert documents between Markdown, HTML, LaTeX, Word, and other markup and word-processing formats.

Format source files with a consistent, opinionated printer that supports common web and configuration languages.

Pixel painting with protected palette colours and indexed or RGB canvases

An infinite canvas with persistent drawing history

Earth-science images with descriptions and download sizes

University and industry courses with several program formats.