
Cartesium · Learn through interaction
Learn through interactive experiences with an AI companion that guides you in real time.
khalis_ux · Product Hunt
CartesiumAI Learn by experimenting with a real-time AI companion
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3858 projects

Learn through interactive experiences with an AI companion that guides you in real time.
khalis_ux · Product Hunt
CartesiumAI Learn by experimenting with a real-time AI companion

A social network where founders take positions on business decisions and compare judgment with peers.
u/meliksah-eminoglu · Reddit
built a decision-making social app 3 days ago, and it’s already converting visitors into users Im a solo founder and vibe coder with six years of experience building and advising in blockchain/crypto. Three days ago, I launched the social layer of What Would You Do?, and visitors have already started becoming users. The app turns a messy spoken or written dilemma into three clear paths with visible priorities and tradeoffs. You can keep it private or share an anonymized version with the com

Drop or spit objects and measure the fall height using real physics simulation.
u/daboehla · Reddit
I built a web app that measures how high you can spit (or drop anything) using real physics Hey 👋 I made a silly web app called Spuckometer: you drop or spit something, tap to time the fall, and it calculates the height — using a real physics sim with air resistance, so a spit blob gives a different result than a stone. It's a PWA, vanilla JS, no framework, no sign-up. Built it mostly for fun (and to play with the drag physics). There's a mascot named Klaus whose eyes follow your cursor 👀

Calculate your Bazi birth chart with true-solar-time correction and Five Elements analysis.
u/JianJi-Bazi-Creator · Reddit
I spent over 2,000 USD on AI tokens turning my childhood hobby (Chinese astrology) into a free web tool Hey everyone — I built www.jianji.uk/rd , a free Bazi (Four Pillars of Destiny) reading tool. Sharing it here as my first "real" side project. Quick backstory: I grew up fascinated by the Yi Jing and Chinese destiny studies. When I first started working, I used to cast charts for colleagues and friends — sometimes with uncanny accuracy. One time, using a classical method from the San Min

Play D&D solo or with friends using an AI Dungeon Master, fully voiced, directly in your browser.
u/Drix_The_Gamer · Reddit
DrixDM – AI-Powered Dungeon Master - Early Access - Need Testers DrixDM – AI-Powered Dungeon Master - Early Access - Need Testers DrixDM - Looking for testers! I've created an AI-powered Dungeon Master that lets you play D&D solo or with a party, fully voiced, directly in your browser. No rulebooks, no prep, no scheduled sessions. Built-in party chat means you don't need any external apps. My goal is to make D&D more accessible. I want to remove the barriers that keep people from playin

A collaborative room where group conversations are transformed into working software through AI agents.
u/Chemical-Golf-4926 · Reddit
Make/room - group chats that become a app Groups chat ideas become prompted messages turn into apps. I wanted to see if we can bring connection back in to solo founding. Create delegate use agents, bring your own collection of pokemon llms and then connect with other founders who special in other skills https://make-room-lab.tangstacks.chatgpt.site/?room=guys-d14834 https://github.com/Jaabrakus/tinysaints submitted by /u/Chemical-Golf-4926 to r/SideProject [lin

API for querying structured public X data including posts, profiles, trends, and followers.
u/CodeElectrical7071 · Reddit
X’s API is expensive, so I built a simpler API for public X data I’ve been building ThreadQuery, an API for getting structured public X data into apps and AI workflows. It supports search, post lookup, profiles, user posts, threads, trends, followers, and following. I’m starting with a free beta while I test reliability with real usage. The first 100 verified users get 1,000 free credits. No payment integration yet. I’d love feedback, especially on incorrect data or missing endpoints:

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

Generate MLS listings, social posts, emails, and flyers for property listings in seconds.
@Listfl0wai · X
Just launched 🚀 Real estate agents — paste your listing and get 13 pieces of marketing content in 60 seconds. MLS, Instagram, Facebook, Fair Housing scan, 14-day calendar + more. Free to try. No credit card. #realestate #proptech #buildinpublic

Route requests to Claude, GPT, or GLM through one API key with free daily credits.
@Awais_209 · X
Claude Opus 4.8, GPT-5.5 & GLM-5.2 for free. Get $25/day in credits. No trial or waitlist. One API key works with Claude Code, Cline, Cursor, Roo & OpenAI-compatible tools. Try it: #FreeTier #ClaudeAPI #CodingTools @AgentRouter_0

Estimate the cost of your AI prompts before running them.
quote_first · Product Hunt
QuoteFirst AI Know what every AI prompt will cost before you run it

Convert redemption codes to an image link; each visitor gets one unused code.
galenzhao · V2EX
把一堆兑换码变成一张 Markdown 图片,每人打开领一条 送 App Store / 活动码时,常见两种尴尬: 1. 直接贴一长串码 → 前面的人秒光,后面的人只能干瞪眼,还容易被脚本扫 2. 私信一个个发 → 累,还不好统计 做了个小工具 **兑图**:粘贴一堆兑换码,生成一个图片链接。别人打开这张图,就从池子里领一条没用过的;同一个 IP 只会领到一条,刷新还是自己那条。码发完了显示「都兑换完了」。 ## 怎么用 1. 打开 https://duitu.zhis.eu 2. 粘贴兑换码(一行一条) 3. 复制生成的图片 URL ,丢进帖子 / README / 群里,例如:  `````` ## 规则(简版) - 每个 IP 对同一链接只领 1 条 - 同 IP 再访问:显示当初领到的码,不浪费新码 - 池空了: