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New on the shelf

Free · single file · works offline

Tools worth reusing.

Small web apps that make real things: files for a laser cutter, recipes and schedules, sizing reports and checklists. Each one is a single file. Open it here, or download it and keep it.

Open the library Add a tool you built
Open Acoustic diffuser well-depth calculator
Most opened in the 30 days to 5 November Acoustic diffuser well-depth calculator, as it opens; a real capture, not a mockup. Nothing you enter in a tool is uploaded: each one runs here under a policy that blocks every network request.
Capability

What you can do with them

Each tool does one real job, from the numbers you give it, and hands you a file.

  • Files for a laser cutter

    Cut, score and engrave layers, drawn at real size and coloured the way laser software expects: planters, puzzles, signs.

    For example: Shower Trough

    See all 10 for files for a laser cutter

  • Parts for a 3D printer

    Printable parts sized from your measurements, exported as STL with their geometry checked: feet, fittings, mounts.

    For example: Bolt-through appliance foot maker

    See all 5 for parts for a 3d printer

  • Plans you can follow

    Worked-out recipes, schedules, sizing summaries and checklists, saved as plain text you can print or keep.

    For example: Pepperoni roll planner

    See all 10 for plans you can follow

  • Music and sound

    Songs and score cues made from a few choices, exported as WAV to play and MIDI to rework in any music software.

    For example: Cue sketcher — unsettling score cues

    See all 2 for music and sound
Plainly

Why you can rely on one

Not a marketplace. Nothing you make in a tool is uploaded anywhere, and nothing inside a tool phones home.

  • Works with no connection

    The zip you download is the same file the site runs, without the site's links bar. Open it offline and it behaves the same, with nothing to install.

  • Makes no network requests

    Before a tool is listed it is opened in a browser under a policy that blocks every request, and a request as it loads fails it. On this site it always runs under that policy, so it cannot send anything.

  • Old versions stay downloadable

    When a tool changes, the version you started a build with stays on its page, byte for byte.

  • Open license

    MIT or CC-BY-4.0, shown on each tool's page and inside its zip. Keep it, change it, share it.

  • No AI needed

    A tool is listed only if it works with no AI call. Many were built with one; none need one to run.

Contribute

From a chat to the shelf

If you built a tool that makes something real, it can live here.

  1. Build it in a chat

    Make a tool in a Claude chat that produces something real: a cut file, a plan, a schedule.

  2. Package it

    Paste the prompt from the submit page into that chat. It turns the tool into one self-contained file with a manifest and a license.

  3. Send it in

    I run the same checks every tool here passed, then publish it under your name and license.

How to submit a tool