Every tool in this store, and who each one is actually for

Ten things are on sale here. They fall into two groups that barely overlap: small browser tools for people who resell on eBay and Etsy, and complete source code for developers who want a finished application to read or build on. This page says plainly what each one does, what it does not do, and who should skip it — so you can leave without buying if none of it fits.

Everything here runs on your own machine or in your own browser. Nothing has a subscription, an account, or a server you depend on.

Tools for resellers

These are single-page browser tools. No install, no login, no data leaves your browser. They are priced at a dollar because they each do one small job.

• Free Reseller Toolkit — a title auditor and a marketplace fee comparison, free. It checks an eBay title for wasted characters and keyword problems, and shows what the same sale nets on eBay, Etsy, Poshmark, Mercari and Depop. Start here: it costs nothing and it tells you whether the paid ones are worth a dollar.
• Return Cost — what an eBay return actually costs you. A $42 item that comes back in perfectly resellable condition, with a $6.40 label each way, still costs you $13.80. The refund screen does not show that number. This does, with every line itemised so the breakdown adds up to the total.
• Lot Break-Even Calculator — for pallets, box lots and storage units. Tells you what share of a lot you have to sell, and at what average price, before you are level. Handles each marketplace's own fee basis, including Poshmark's flat fee below $15.
• Billable Weight — dimensional weight. Carriers bill the greater of actual and dimensional weight, and the divisor differs by carrier and service. This works out which one you are being charged for before you buy the label.
• Bin Label Maker — SKU and Code 128 barcode generator, printable. The barcodes were checked three ways: checksums against the spec, round-trip decoded the way a scanner reads them, and cross-checked against a library by a different author.
• Reseller Profit & Inventory Tracker — cost, fees and profit per item, kept in one file you own.

Skip all of these if you want something that connects to your eBay account. None of them do. They take numbers you type or paste; nothing syncs, and nothing asks for your marketplace password.

Source code for developers

These are complete applications with their source. You get the code, you run it yourself, and you can modify it for your own business or client work. They are sold as-is with no support.

• Apex — iOS Drive Tracker — SwiftUI drive tracking with segment leaderboards. 76 Swift files, 15,106 lines, 33 test functions, 10 migrations. Honest limit, stated on the listing: background recording does not work, and the author has no Mac, so the tests have never been observed passing.
• Greenhouse Dashboard — self-hosted grow-tent monitoring in Flask. Temperature, humidity, lux and pressure, computed VPD and dew point, a grow-light schedule that handles crossing midnight, timelapse capture, an outlier inspector using MAD-based scoring, and ESP32 wiring documentation served by the app itself. Demo mode is on by default, so it runs with no hardware at all.
• Wikibuilder — an AI encyclopedia builder with a subtopic explorer. It calls a model provider, so you supply your own API key and you pay that provider per call. Read the cost note on the listing before you run it recursively.
• Ancient Empire Dominion — a browser strategy game template with zero dependencies. It plays from a local file with no build step and no package manager.

Skip these if you want a hosted service, an installer, or support. There is none of that. They are source code, and running them means running a terminal command.

Why the descriptions here are so blunt

Every product page in this store states what the thing does not do, in a section you cannot miss. That is deliberate. These are cheap, and there is no support, so the only thing that makes a purchase work is you knowing exactly what you are getting before you pay. A refund costs us both more than a clear sentence does.

Where a number appears on a listing — assertions, tests, line counts — it was measured rather than estimated, and in several cases the number on the page is lower than an earlier draft claimed, because the draft was wrong and the measurement was not.