ReaderFunded · site
cartesian.app
The Interactive Handbook on Data Structures and Algorithms is a tech site on cartesian.app, in English, funded by its readers: about 2,806 paying supporters on Buy Me a Coffee, estimated.
An interactive online handbook on data structures and algorithms, with visualizers and custom-input experiments, sold as a single purchase.
Visit cartesian.appSupport on Buy Me a Coffee
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5 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/cartesian.app"><img src="https://readerfunded.com/badge/cartesian.app.svg" alt="Reader-funded, verified by ReaderFunded" height="20"></a>
Markdown
[](https://readerfunded.com/site/cartesian.app)
Linked from 8 domains, links to 11; 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.
None of its links lands on a funded site.
Sites the same sources link to, by cosine over the sets of linking domains. More.