About Fondsites

Fondsites is a place for the things you’re fond about. Find a guidebook, play an original browser game , or try a free tool to understand how something works.

Who makes it

Fondsites is published by TensorSpace, Inc., a U.S. software company, and edited by its founder, JJ Ben-Joseph . We build the games and tools ourselves, with simulations you can explore in your browser.

How we publish

Our guidebooks are drafted with AI assistance and reviewed, revised, and approved by a human editor. We link to sources, explain tradeoffs, and correct mistakes. AI-generated editorial illustrations are labelled on the pages that use them. Our editorial policy explains the process.

Guides are for general information. For health, safety, legal, or financial decisions, seek qualified advice.

Get in touch

Have an idea for a new Fondsite, a question, or something we should fix? Contact us and let us know.