Visualization

Generate color palettes based on harnomy

Color palete advice for maps

Generate color palettes

Wolfram Alpha is an AI assistant that does data analysis in a smart way.

Geogebra is the classical. GeoGebra can be used for precise charting as well as simple calculations.

Desmos is a simple online charting tool that creates interactive charts.

Graph.tk is a dead simple online charting tool that creates interactive charts.

Plotly is a set of open-source graphing libraries. Plotly is the goto library to make interactive charts in Python, R, or JavaScript.

The online version of Mathematica!

A toolkit for coding and writing online. The UI is a bit outdated but the services are real hardcore.

Azure notebooks is simply a hosted Jupyter notebook.

Kaggle is a competition platform that bundles online computing Jupyter notebooks and data management.