Small, sharp tools
for people who ship.
BrackenKit catalogues tested templates, free calculators and worked-example guides for developers and freelancers. Every product is built, installed and checked route-by-route before it's listed — and priced like a tool, not a platform.
Polar Storefront — Next.js Digital Product Store Template
A minimal, tested Next.js storefront with Polar.sh handling payments, VAT and file delivery. No database, no auth, no CMS — nothing to maintain.
- Complete Next.js 16 + TypeScript project (App Router)
- Typed product catalog — add a product by appending one object
- Polar checkout route, success page and signed webhook endpoint
- Editorial design system in plain CSS with automatic dark mode (three self-hosted typefaces)
- Four example products with SVG cover art — a complete fictional demo shop
Useful on their own. Free forever.
Worked examples, real numbers, no filler.
Do you pay tax on side project income in the UK? The £1,000 rule, explained with real numbers
When template sales, bounty payouts and other side income become taxable, what the £1,000 trading allowance actually covers, the 5 October registration deadline, and the merchant-of-record wrinkle nobody writes about.
Read the guide →A Polar + Next.js template for selling digital downloads (no database)
What it actually takes to build a digital-download storefront on Polar.sh with Next.js — the checkout route, file delivery, the parts everyone forgets — and a template that skips all of it.
Read the guide →Gumroad vs Polar fees in 2026: the actual maths for developers
Both are merchants of record now, so the real difference is fees and workflow. Exact 2026 rates, worked examples at $5, $19 and $49 price points, and the payout fee nobody mentions.
Read the guide →