Domain Arrivals
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Featured in Domain Arrivals · 2026-08-17

Tenon Tools: Construction Math That Shows Its Work

tenon.tools ↗ · Useful Tools · score 79.0
○Open: public page gives enough substance to understand the site $Paid: pricing, booking, ecommerce, subscription, or paid access is visible ADAds: visible ad load or ad-supported content ✦Pretty: notable design, copy, craft, or presentation ◆Pro: polished, finished-feeling, serious, or operationally mature ◇Niche: specific audience, workflow, or unusually focused use case ◉Human: personal, local, community, civic, handmade, or real-person signal !Suspicious: scammy, spammy, trust theater, finance fog, or credibility concern

A set of free construction calculators for concrete slabs, rafters, and stair layouts, alongside planned pay-once field apps.

Why it surfaced

Tenon states its formulas and verifies worked examples against shared test vectors, with imperial-to-metric switching built into the calculators. Its planned apps extend that unusually transparent approach to branded PDF quotes, timestamped photo binders, and one-minute site diaries—with offline use, no ads, and no subscriptions.

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Monica’s Calendar of Flowers

August 17’s newborn domains include a calendar that spreads flowers for Monica across the months after JP’s death, 17 years of a master mariner’s logbooks, the seconds between a modem connection and the first web request, and an Indian bus cabin carrying 632 songs.

This is one of 1,000 discoveries in the 2026-08-17 Domain Arrivals issue.

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