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A maths fact programme with an online tutor and a printable partner-practice route.

Formulas and notes arranged on a mathematical worksheet

Scientific and everyday calculations with units

Mathematical calculators organized by learning topic

Symbolic and numerical mathematics with notebook interfaces

Symbolic calculation through a compact command interface

Symbolic, numerical and graphical mathematics tools

Everyday calculation categories with a simple keypad

Convert TeX-family sources into web and ebook formats

Engineering calculations documented in natural notation

Basic maths videos and worksheets organised around numeracy, arithmetic and related topics.

Paint, draw vectors and assemble editable artwork on Mac and iPad

Unicode emoji artwork with a JavaScript text-to-image parser.

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

Annotate webpages and images together on a browser whiteboard.

Ray-traced scenes described with a text-based scene language

A freeware icon and cursor editor with library-management support.

Browser vector drawing with point controls and editable SVG handoffs

Calculators for work, study and household questions

Symbolic, numerical and number-theory calculators

Maths explanations, puzzles, games, a dictionary and worksheets.

Generate programmable palettes from anchor colours and curved paths.

Frame screenshots and recordings in device compositions.

Photographic Photoshop scenes for devices, zines and outdoor graphics.