ReaderFunded · site
afreeparticle.com
a free particle is a science site on afreeparticle.com, in English, funded by its readers: about 20 paying supporters on Buy Me a Coffee, estimated.
A collection of interactive Desmos physics simulations for introductory courses, created by high school teacher Michael Freeman.
Visit a free particleSupport on Buy Me a Coffee
Is this your site? There is a badge you can show, with the live figure.
43 pages indexed; the pages that lead the site by its internal links:
For the site's owner: a badge that says readers fund it, linked to this page. It shows the live figure, so it never goes stale; a count appears once a platform publishes one.
HTML
<a href="https://readerfunded.com/site/afreeparticle.com"><img src="https://readerfunded.com/badge/afreeparticle.com.svg" alt="Reader-funded, verified by ReaderFunded" height="20"></a>
Markdown
[](https://readerfunded.com/site/afreeparticle.com)
Linked from 6 domains, links to 30; of the latter, the funded sites are shown. Funded sites first, then the sources that link to fewest other funded sites. Links as seen in the Common Crawl domain graph (cc-main-2026-aug-sep-oct), cut 2026-10-23: the pages crawled in a window of three months, not necessarily the site of today, and a page not crawled in that window leaves no link.
Sites the same sources link to, by cosine over the sets of linking domains. More.