demo

You're looking at Subzero Landing running on its own placeholder content — every product, repo and commit below is sample data that ships with the template.

● Independent software · shipping since 2026

I build small, cold, fast things.

Kits, tools, books and services for developers — some free and on GitHub, some paid. All built the same way: no bloat, no dark patterns, source you can read.

Everything, up front

6 products · 5 live · pick one
KitexampleLive

Nimbus UI

64 React + Tailwind components in a frost-glass system. Copy the file, ship today.

$59$39View →
BoilerplateexampleSept 2026

Nimbus Starter

Next.js + auth + payments + dashboard, wired and deployed. Skip the boring fortnight.

$129Notify me →
Open sourceexampleLive

sweepdir

Finds the gigabytes of regenerable build junk — node_modules, .venv, target — rotting across your projects. Any OS, zero deps.

Free foreverGitHub →
PDFexampleLive

The Dark Mode Handbook

Why your dark theme looks muddy, and the 40 fixes. 68 pages, all with code.

$19Preview →
SaaSexampleLive

Pulsecheck

Uptime monitoring that texts you before your users do. 30-second checks.

$9/moTry free →
TemplateexampleLive

Coldstart Landing

The page you're looking at, as a template. Static export, zero runtime deps.

$29Live demo →
How it's built

Don't trust screenshots. Poke it.

Everything I sell is built from the same parts as this site. The panel below is live — press the button, flip the switch, drag the slider. Then read the source next to it: that's the entire component. No wrapper library, no magic.

playground·live
button — click it
switch — on
62
slider — drag it
gauge — synced to slider
gauge.tsx·the whole thing·16 lines
// no chart library. it's a conic-gradient.
export function Gauge({ value }: { value: number }) {
  return (
    <div
      role="meter"
      aria-valuenow={value}
      className="gauge"
      style={{ "--p": `${value}%` }}
      data-value={value}
    />
  )
}

/* .gauge { background: conic-gradient(
     var(--accent) 0 var(--p),
     var(--track) var(--p) 100% ) } */
Open source

Free is the front door.

Most people meet us through these. MIT-licensed, maintained, and small enough to read in one sitting.

github/sweepdirexampleFind and reclaim regenerable build junk — node_modules, .venv, target — across all your projects, safely, on any OSTypeScriptv0.1.0 · MITgithub/conicexampleCharts without a chart library. Twelve CSS recipes that draw gauges, sparklines and rings with zero JavaScriptCSSv0.3.1 · MIT
Changelog

Proof of life.

Shipped recently. The log is public because momentum should be verifiable.

a3f9c21example

Nimbus UI 2.1 — 12 new components, command palette rewritten from scratch, focus traps fixed.

v0.1.0example

sweepdir — first release — finds regenerable build junk across JS, Python, Rust, Java and .NET projects. Report-only by design.

c88ab02example

Pulsecheck — SMS alerts out of beta, added EU region checks.

19f30e7example

The Dark Mode Handbook — second edition, 12 pages longer, new chapter on elevation.

New things, roughly monthly.

What shipped, what broke, what I learned. No launch hype, unsubscribe in one click.

no spam, ever — just the log

Theme