About Catzoid

One developer.
Four cats.

Catzoid is a family of free, open-source developer tools, made in Indonesia by one person who got tired of herding a dozen apps to run one project.

scroll ↓ the dock is full

DevCatzDBCatzDialCatzDoCatz

11 tools, one project · then four cats

Ryan N.R.

The maker

Hi, I’m Ryan.

Developer · Indonesia

“A Dock full of dev tools is how a Mac learns to sigh.”

I build DevCatz, DBCatz, DialCatz and soon DoCatz — the tools I wanted on my own Mac: sites on real https:// names, every database in one window, an API client that knows them both. Before the cats there was MrCatz DataTable.

GitHub@ryankucinggGitHub ↗Threads@ryan.nr_Threads ↗Community & contact

Why the cats

It started with a very full Dock.

  1. 01

    Eleven tools to run one project.

    A local server here, a database client there, an API client, a tunnel, a mail catcher, a container app — each with its own window, its own settings, its own idea of where your project lives. The Dock filled up. The Mac sighed.

  2. 02

    So I built one cat. Then another.

    DevCatz first, to run every site on a real https:// name with its databases beside it. DBCatz, because the databases wanted a window. DialCatz, because the sites wanted to be called. DoCatz is on the way to carry the containers.

  3. 03

    All cats, no catch.

    Free, open source, no account, no Pro tier. The cats know each other, so setting one up makes the others notice. If they save you time, feed them; if something hurts, every one of them has Help → Report a Bug… — and a person reads it.

How it’s made

Written with Claude.
Checked by a person.

The code of the apps, the API and this site is written together with Claude by Anthropic, an AI assistant. I decide what each cat does and how it looks, try every feature on a real Mac and review every change before it ships; Claude writes and explains the code with me.

Built withby Anthropic ↗
  • Nothing on trustThe source is open — read it, run it, question it.
  • Every commit says soCo-Authored-By: Claude is in the history, not hidden.
  • A person at the endEvery bug report and every review lands with the maker, not a bot.
  • IndependentCatzoid is not made, sponsored or endorsed by Anthropic.

Ready for adoption

Meet the litter.

Free, open source, and they already know each other. Pick one; the others will notice.

DownloadCatzoid on GitHub