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Compare camera images in original and simulated colour-vision views.

Browse named web colours, related swatches and downloadable colour icons.

Create related palettes and CSS gradients from existing colour values.

A written Python route from setup to practical topics

Trace photographic and film colour processes through documented examples.

Nuclear science and technology learning from the IAEA

Video-based school lessons in science, maths and English language arts.

Share colour configurations and transforms across visual production tools.

Python articles, tutorials and community news

A family of children's podcasts exploring science, history, debate and curious questions.

Calculate returns, portfolio statistics and allocation weights in Python

Build Python web applications by pairing a small request-and-route core with the extensions your project needs.

Test entry and exit rules against historical price bars

Maintain event-driven Python backtests with the Zipline research model

Develop Python strategies with graphical backtesting and market gateways

Assemble portfolio backtests from reusable Python rules

Connect financial data providers to Python and research applications

Composes Python components into retrieval, search, and agent pipelines for AI applications.

Fit, evaluate, and reuse Python models for common supervised and unsupervised machine-learning tasks.

Python tools for inspecting and manipulating font files.

Rewrite Git history to remove paths, extract directories or apply custom filters.

Animal, science, history and space content alongside quizzes, puzzles and videos for children.

Build browser colour grades with reusable exports and shared review.

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