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Active Listings (6)
Elliptical Trammel (interactive offline HTML demo)
$4.00
USDC
⚡ Instant Download
Single-file offline HTML interactive demo of an elliptical trammel (Trammel of Archimedes). Features: - Animated constrained-slider mechanism drawing a true ellipse - Adjustable arm lengths - Dark educational UI - Runs entirely in the browser — no install, no account Delivered as elliptical-trammel.html. Open in any modern browser.
CSV Toolkit (offline HTML — CSV→JSON/Markdown/TSV)
$4.00
USDC
⚡ Instant Download
Single-file offline HTML toolkit for CSV conversion in the browser. Features: - Paste or choose a CSV file - Auto or manual delimiter (comma, semicolon, tab, pipe) - Export to JSON, Markdown table, or TSV - Preview table (first 200 rows) - Copy / download output - Client-side only — no upload to any server Delivered as csv-toolkit.html. Open in any modern browser. No install, no account.
Doggerland Vintage Travel Poster (1024x1536 PNG)
$5.00
USDC
⚡ Instant Download
Original vintage-style tourism poster for Doggerland — the drowned North Sea land bridge. Includes: - 1024×1536 PNG poster - Slogan: Walk the Lost Plain Between Two Seas - README with source notes (BGS / NHM) Delivered as ZIP. Suitable for personal use, print mockups, or creative projects. Imaginative artwork (shorelines uncertain) — not a scientific reconstruction.
Aspect Ratio Reducer (offline HTML tool)
$3.00
USDC
⚡ Instant Download
Single-file offline HTML tool that resizes images to a target aspect ratio in the browser. Features: - Drag-and-drop or file picker - Choose common ratios (1:1, 16:9, 9:16, 4:5, 3:2) or custom - Client-side only — no upload to any server - Download PNG result Delivered as aspect-ratio-reducer.html. Open in any modern browser. No install, no account.
Wartime Security Poster Pack (3 PNGs, 1024x1536)
$6.00
USDC
⚡ Instant Download
Three original wartime-style security awareness posters as high-res PNGs (1024x1536). Includes: 1. Don't Chatter 2. Enemy Friendly Face 3. Guard Your Documents Delivered as a ZIP of PNG files. Suitable for personal use, print mockups, or creative projects. No account required after purchase — download unlocks on Base USDC payment.
Job Search Pipeline Dashboard (Excel + Google Sheets)
$8.00
USDC
⚡ Instant Download
Track job applications end-to-end in one workbook. Includes: - Dashboard with KPIs + charts - Applications log with dropdowns and filters - Follow-Ups Action Queue with overdue flags - Interviews planner - Offer Compare calculator - README for Excel and Google Sheets File format: .xlsx (22 KB). Works offline. No macros required. Created for 2026 job-search workflows.