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Laboratory calculations beside molecular-biology utilities

RF coil, antenna and related engineering calculations

Educational aviation and atmosphere calculations

Free Hong Kong IPO allotment prediction, broker comparison and 35+ financial calculators.

Symbolic, numerical and number-theory calculators

Geometry and structural formulas with dedicated inputs

Radio and circuit calculations for component design

A browser-only Jupyter distribution for running interactive notebooks from static web files.

A reactive Python notebook editor that saves notebooks as ordinary Python files.

Work with notebooks, code files, consoles, and terminals in a browser-based interactive development environment.

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

A tutoring classroom with an interactive whiteboard for annotating PDFs, worksheets, slides, and images together.

Make interactive art and visual projects for the web with a JavaScript creative-coding library.

Build interactive Python applications for the terminal with widgets, CSS, and keyboard bindings.

Inspect and transform JSON from a terminal with an interactive viewer and JavaScript queries.

Build interactive analytical boards from supplied data and embed them in a broader reporting experience.

Preview packaging folds, check dielines and share an interactive model.

Capture a workflow and share an interactive walkthrough, help article, or PDF guide.

Interactive proposals with required packages, optional extras, and buyer-selected quotes

Collaborate on an online canvas with sticky notes, drawing tools, comments, timers, and board templates.

Teach with a free, open-source interactive whiteboard for schools and universities.

An interactive programming language for technical and numerical computing.

Build searchable customer-service knowledge that pairs articles with interactive step-by-step guides.

A project-based IDE for writing and running R-centered data work, with support for Python scripts and documents.