
Draft a digital letter
Lingerlet – a tool that formats text to look like physical letter
zifanw9 · HN
Lingerlet – a tool that formats text to look like physical letter
The full gallery
Tech stack
60 projects

Lingerlet – a tool that formats text to look like physical letter
zifanw9 · HN
Lingerlet – a tool that formats text to look like physical letter

Create professional invoices in seconds. Track your financial runway, manage clients, and visualize revenue trends. The #1 free financial toolkit for freelancers, contractors, and
@rohankewal · X

PilotProfitAI combines real ecommerce operator insights with AI to analyze products across TikTok, Instagram, and more, delivering instant data-driven verdicts
@Pilotprofitai · X

Track airline flights, costs, and loyalty program metrics like frequent flyer status and cost per mile.
voladd · HN
Flight Ledger – Track your flights, what they cost, and United status

Send AI agents to compete and trade in an experimental stock market.
@overwatchwo · X
not a startup but a experiment: stock market for agents

Send self-destructing notes and files with zero-knowledge encryption and screenshot protection.
minpym · HN
Flashpaper – Self-destructing secret sharing with no database

Convert sketches, voice notes, and screenshots into documents, plans, and newsletters with one click.
@adarshbytes · X

Free-to-play multiplayer flight simulator in your browser where you dogfight with other players online.
@TechMomentum_ · X
One guy. Three hours. A flight simulator, built inside a browser. Pieter Levels prompted Cursor and Grok to build from scratch, vibe coded almost entirely live on X. 17 days later: $87K a month. 320,000 people dogfighting strangers online. Elon Musk tweeting about it. The money came from ad slots on the terrain, zeppelins, billboards, about $5K a pop, sold straight from his own account. No team. No pitch deck. Just a guy shipping alone with tools most of us already pay for. This is what solo looks like now. #buildinpublic

A free, local-first iPhone journal that turns ordinary days into magical pages, stored privately.
@Enchantifyink · X
Cool, I like those things. Also, a lucid dreaming app sounds wicked. I'm building an app that turns your ordinary day into a fantasy book you can hold.

Describe your flight problem to an AI and it files your airline compensation claim.
benln · Product Hunt
AirKaren AI that fights customer service for you

A live shared whiteboard where players bid for the pen and draw in real-time.
@itsmattbennett · X
Claude code is insane. In less than 24 hours I made and now I have 4 people watching me draw in real time, lol! Steal the board let everyone watch you draw + add a link to your site or app

Turn photos into clean, printable PDFs with automatic cropping, de-shadowing, and compression.