Domain Arrivals
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Featured in Domain Arrivals · 2026-08-16

Rivumi Turns Cosplay Into a Build Sheet

rivumi.app ↗ · 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 planning tool that breaks a costume into components and recommends whether to buy, make, modify, or reuse each one.

Why it surfaced

Rivumi weighs budget, tools, skills, and wear date, then explains the reasoning behind every call. Its sample Gojo Satoru sheet includes a blindfold to make, a jacket to buy, trousers to own, and boots to modify—a satisfyingly concrete answer to cosplay planning.

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The 240-Material Organ

August 16’s newborn domains include a 240-material perfume organ, a repeatedly saved JPEG cat, a ski tracker designed by a 15-year-old, and a searchable page claiming to contain 148,303 prescription records.

This is one of 1,000 discoveries in the 2026-08-16 Domain Arrivals issue.

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Fall Line Counts Every Foot on the Mountain falllineskiing.com

Fall Line is a purpose-built ski tracker that records vertical, runs, and speed from a small one-button device, without keeping a phone running all day.

 299 WORKS: A Model Maker Builds the Tools He Needed 299modelworks.com

A Japanese maker portal combining scale-model galleries, detailed build journals, Blender add-ons, 3D-printing experiments, and a searchable paint reference tool.

 Sugarcane's Weather Station passingweather.com

A private, on-device mood-and-wellbeing notebook that turns a day into a small weather report.