Zip
Rehearsal Kit
A $1 dress rehearsal for the marketplace pipeline
A tiny test product proving the full buy-and-download flow: checkout, order, library, download. Delete before launch.
See the kit →UI toolkits · From the studio behind Kellith
Interface work that has already survived production.
Component systems for React, Next.js and Flutter — extracted from the studio’s production software, then documented and packaged for yours.
The first releases are being prepared now. Early-access readers see each kit before it goes on sale — and set its price.
The catalog
Three kits, three stacks, one standard.
React · TypeScript · Tailwind CSS v4Coming soon
Ledger
An admin console toolkit for React
Data tables, filter rails, detail drawers and activity feeds — the working parts of a serious admin console, styled and accessible.
See the kit →Next.js · TypeScript · Tailwind CSS v4Coming soon
Foolscap
A classic-premium marketing site kit
Serif display type, hairline rules, brass accents — landing page sections for products that would rather look established than loud.
See the kit →Flutter · DartComing soon
Timepiece
A Flutter kit for time & attendance UIs
Range calendars, day-status views, choice pills and request flows — the mobile HR patterns nobody should build twice.
See the kit →Why these kits
Extracted, not invented
Every toolkit begins life inside a production application. The states, edge cases and accessibility work are designed in from the start — not left as an exercise.
Systems, not screenshots
Each kit ships as a coherent design system — tokens, type scale and rhythm documented — so what you build alongside it looks native.
Licensed plainly
Straightforward commercial licensing, stated in plain language before you pay. No seat-counting surprises three months in.
The studio
Built by the team that builds Kellith.
Kellith is an operating system for business software — products assembled from reusable business modules, built and run in production by this studio. These toolkits are the interface work underneath it, packaged so your product starts from working parts instead of a blank file.