Sites like john-coene.com

Kyle Walker's data science blog and consultancy site on GIS, census demographics, and spatial analysis in R

A personal blog and course site by Dr. Albert Rapp on R, data visualization, data cleaning, reporting and web development

Personal site of economist Mauricio Vargas Sepúlveda, a PhD student, with blog posts on trade and R tools

vis.js community edition: a JavaScript library for interactive network, timeline, graph and dataset visualizations in the browser

Framework7, a free open source framework for building mobile, desktop and web apps with native look and feel

disk.frame is an R package for larger-than-RAM data manipulation on disk, documentation, changelog and articles by its author, now soft-deprecated

ggplot2tor is a tutorial site and app collection on the R ggplot2 plotting package by Christian Burkhart

Wiki.js, an open source wiki software project for writing and publishing documentation, with versions 2.0 and 3.0

MapLibre is an umbrella organization developing open-source mapping libraries and tools for web, mobile and vector tiles

SportsDataverse is an open-source project of R, Python and Node.js packages and a free sports play-by-play data warehouse

A Python plotting library documentation site for Matplotlib, covering static, animated and interactive data visualizations

Econometrics and Free Software, a blog by Bruno Rodrigues on R, Nix, econometrics and data science, with books and talks

Django Girls is a non-profit organization running free Python and Django programming workshops for women, with open online tutorials

Stan, an open-source software project and documentation site for Bayesian statistical modeling and inference across several programming languages

A searchable database of public-domain silhouette images of organisms for use in scientific and educational work, with a free API

Shields.io is a service that generates concise, consistent badges for GitHub readmes and other web pages

A React component library company offering free Material UI components and MUI X advanced data tools for building web interfaces

Peer-reviewed tutorials teaching humanities scholars digital tools and techniques, published in English, Spanish, French and Portuguese editions

NumPy project website: the official home of the open source Python library for numerical computing and N-dimensional arrays

A blog by Tom Mock on R programming, data visualization, sports data and data science tutorials, plus short notes learned

COIN-OR news blog on open-source operations research software, announcing the COIN-OR Cup awards and foundation board notices

Data visualisation consultant Cara Thompson's site offering commissions, training and blog posts on R ggplot2 charts and storytelling

A podcast hosting platform, Fireside, that lets creators publish and distribute their shows to directories

A blog by statistician Gavin Simpson on R programming, permutation tests, generalized additive models and palaeoecology research

The HDF Group, a non-profit company maintaining the HDF5 data format and library for scientific and engineering data management

A JavaScript date and time picker component library called Vanilla Calendar Pro, with TypeScript support and no dependencies

A free open-source CDN serving popular JavaScript, CSS and font libraries, with an API and library catalogue

Leanpub, a self-publishing platform where authors sell early-access and in-progress books, including technical titles on software and AI

The pages came through as binary garbage with no readable titles or headings, so the site's subject can't be determined from them. Going only by the domain, python.org is the official home of the Python programming language

Gephi, an open-source software project for visualizing and analysing network data through graph layouts, metrics and community detection

VirtualGL, an open-source project providing GPU-accelerated 3D rendering to remote X11 clients, with news, documentation and package repositories

A documentation site for pytest, the Python testing framework, with a list of talks, books and tutorials about it