Mostly free — kids’ learning games, family games, live stream, cooking, worship times, card grading, and market terrain. House Radar is $2.99 and the eight desk tools are $5 each. Pick what you need.
Free browser games and learning challenges for all ages. No downloads, no sign-up, no ads.
Play games →Letters, sounds, coins and reflexes for ages 4–8. Tap one and play — no download, no account, no ads. Works on a school Chromebook.
Play free →Watch the squad live on Twitch. Shared rooms, game on the big screen, go live from the host Mac.
Open /stream →Cook the world tonight — cuisine meal plans, recipes, and local grocery prices with a guided cook-along.
Open Kitchen →Find Mass and service times across 7,400+ places in U.S. dioceses, including Boston, Philadelphia, Chicago, LA and Miami.
Find worship →The same Mass Finder as a free app for iPhone and Mac.
Free on the App Store →Snap eleven guided photos of a trading card. Get an AI condition estimate back — corners, edges, surface and centring.
Grade a card →Live BTC positioning terrain, market-maker hedge force, and analog-matched short-term forecasts.
Open Quant →Same long bet: stock vs call and put. Delayed demo names the cheaper ticket. The spreadsheet itself is free on Gumroad.
Free on Gumroad →A Mac app that turns vendor quotes, invoices and receipts into a clean Excel workbook. The total on the page is the total in the sheet, and nothing leaves your Mac.
Free on Gumroad →Free piano app for iPhone, iPad and Mac. Play a preview in the browser first — no install, no account.
Free on the App Store →See what is on your Wi-Fi and what just joined it. Lost a Bluetooth device? Walk around and it says warmer or colder until you are standing on it.
$2.99 on the App Store →The NY Fed's two overnight rates as free JSON, CSV or a single number. No key, no sign-up, CORS open.
Read the docs →Eight small tools that each do one job. Every one is a single HTML file: double-click it and it runs on your own computer. No installer, no account, no subscription, nothing uploaded.
Ranks a catalog of small business models against the cash, hours, and skill you actually have.
$5 on Gumroad →Finds the axial force in each bar of a plane truss, and the reactions that hold it.
$5 on Gumroad →Orders a short list of stops and gives the straight-line miles.
$5 on Gumroad →Finds the critical path of a short job, and the tasks that can slip.
$5 on Gumroad →Lays rectangles on a sheet and leaves a saw kerf between them.
$5 on Gumroad →Measures a finished mix on your computer and says whether it sits in a delivery window.
$5 on Gumroad →Turns photos into a contact sheet or a small catalog.
$5 on Gumroad →Cleans a messy spreadsheet export on your computer.
$5 on Gumroad →