Most of The Human Brain App is a private platform — accounts, subscriptions, personal data. Everything on this shelf is the opposite: public on purpose, free forever, and each one states exactly what it is, what it tracks, and what it is not.
A crisis directory for Fresno: real phone numbers for mental-health, trauma, crime-victim, and grief services — every one checked against its official source (September 2026).
Why it's public: The moment someone needs it most is the worst possible moment for a login wall.
Tracking, honestly: No account required. No personal data collected — it's a directory of other people's official services.
OPEN ITNovice-to-journeyman curriculum, California's real DIR certification roadmap (hours, exam blueprint), an Ohm's Law trainer, NEC sizing drills, and a 40-question practice quiz.
Why it's public: A trade can change a family's whole trajectory — this knowledge isn't mine to gate.
Tracking, honestly: No account required. Curriculum progress saves only in your own browser.
OPEN ITDrop photos in, get smaller ones out — JPEG, WebP, or AVIF, whichever measures smallest per image. Compression runs entirely in your browser; your photos never leave your device.
Why it's public: It costs almost nothing to give, and it's useful to almost everyone.
Tracking, honestly: No account required. The only log: anonymous counts (a visit, a compression, a download, and raw byte totals). No filenames, no photos, no accounts, no IPs.
OPEN ITDrop in two or more CSV files and see exactly which rows they share and which are unique to each — computed entirely in your browser. It can even export itself as one offline HTML file you keep forever.
Why it's public: It runs 100% on your machine, so charging for it would be a toll booth, not a price.
Tracking, honestly: No account required. Nothing uploads — files are read and compared in the tab; close it and everything is gone.
OPEN ITLetters and numbers for tiny kids — tap an A, hear it spoken in your device's own voice, see a friendly picture, count to 10 along with the app.
Why it's public: Every parent with a tablet deserves a tracker-free version.
Tracking, honestly: No account required, and no analytics at all. Play progress saves only in your own browser; nothing about your child is recorded anywhere.
OPEN ITImport a spreadsheet, get a privacy scan that flags likely personal-data columns (emails, phones, IDs), redact them, compute honest stats, and download an audit report — all in-browser.
Why it's public: A privacy tool that uploads your data to someone else's server would defeat itself.
Tracking, honestly: No account required. Files never leave your browser — every step runs locally and the report downloads straight from the tab.
OPEN ITA 3D voxel city you carve with a glowing slice plane — and the cross-section you cut is a real 2D platformer that morphs live as you drag the blade. Orbs, levels, and two dimensions in one screen.
Why it's public: It's a whole game-engine demo that costs nothing to share and never asks who you are.
Tracking, honestly: No account required. No analytics, no uploads, no saves at all — close the tab and it's gone.
OPEN ITSix snails, five biome circuits, 3D grand-prix racing with slipstream drafting, a top-down garden gauntlet, a driveable hub — and a daily time trial against the ghost of your own best run.
Why it's public: "Free-to-play" usually means free-to-be-tracked; this one is free the honest way.
Tracking, honestly: No account required. The daily ghost is your own recorded replay, kept only in your browser — nothing is sent anywhere.
OPEN ITA cozy 3D shift: sweep the whole street clean before the timer runs out, then watch the sun come up on your work.
Why it's public: A calm little game like this shouldn't need an account, a store, or a data policy.
Tracking, honestly: No account required. No analytics at all — nothing leaves the tab.
OPEN ITThe classic block-stacking arcade in one canvas — tap to drop, trim your overhangs, and chase your own high score.
Why it's public: Some games are too small to gate and too universal to keep.
Tracking, honestly: No account required. No analytics, no uploads — everything stays in the tab.
OPEN ITBumpers, flippers, a charge-up launch, three balls, and physics in a single canvas — a tiny, honest pinball table.
Why it's public: Classic arcade, zero strings — the way it always should have been.
Tracking, honestly: No account required. No analytics, no uploads — nothing is stored anywhere.
OPEN ITPure reflex: slide left and right, outlast the swarm, and watch it speed up the longer you survive.
Why it's public: The simplest game on the shelf proves the point best — free means free.
Tracking, honestly: No account required. No analytics at all; close the tab and it forgets you.
OPEN ITThe Big Three of geometry as things you can drag: a Pythagorean explorer with the squares drawn on the sides, parallel-line angle pairs that stay labeled, and congruence postulates you can break on purpose. Built around "experience first, formalize later" and "label everything."
Why it's public: Tutoring is one of the most monetizable things in education — this is the study-aid version, free on purpose.
Tracking, honestly: No account required, and no analytics at all — nothing leaves the tab.
OPEN ITPick any hue, re-anchor the whole 12-step color wheel around it, and get exact harmony palettes — complementary, analogous, triadic, split-complementary, tetradic — computed live as you drag.
Why it's public: Design tools sit inside paid suites for the same wheel math; this one computes it in your browser and states what HSL rotation can't model.
Tracking, honestly: No account required. No analytics, no uploads — every palette is computed in the tab.
OPEN ITA deterministic physics simulation: four particles constrained to a superellipsoid surface, 60,000 timesteps, graphed and animatable — with a one-click export of the whole experiment as a standalone offline HTML file.
Why it's public: Modeling and simulation software sells licenses; this one runs in a tab and gives itself away.
Tracking, honestly: No account required. No analytics, no uploads — and the standalone export runs offline forever.
OPEN ITThe Human Brain App · no-fibs software · built by Steve