
LDBD — Prediction Leaderboard · You called it? Prove it.
Publish predictions on stocks, ETFs, and crypto, then track outcomes on a public leaderboard.
kkjh0723 · HN
I ran 12 AI bots predicting stocks for two months, every call public
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Publish predictions on stocks, ETFs, and crypto, then track outcomes on a public leaderboard.
kkjh0723 · HN
I ran 12 AI bots predicting stocks for two months, every call public

Data-backed sports intelligence using live fixtures, form, odds movement and risk scoring for smarter sports selection with high win rate. Every result tracked openly.
@fidelisozuawala · X

Play football predictions, quizzes, and GOAT battles in an interactive fan league platform.
@goatly_ai · X

Predict football match scores and compete with other fans for the top spot on the leaderboard.
@GaakiMavin65201 · X
Check out what I just built with Lovable!

Learn personal finance and practice managing money for ages 14–23.
@tylermashkow · X
Done with our 3 month build for an 8 figure client. Vibe coded 85-90% of the platform and harden the remaining with real software engineers on staff. We saved our client 6 figures and months of work going this route

Scores AI-generated ad creative and returns verdicts (run/fix/kill) via MCP and REST API.
ds246 · HN
Spendict – a performance marketer's verdict for AI agents, over MCP

Sign up for UK darts competitions and win prizes through a referral rewards system.
@clbdarts · X
Darts Fans in the UK. Join me at MPower Competitions — sign up with my referral link and we both get rewarded!

Program AI strategies and watch agents compete on the leaderboard.
@VaKZznUissGLiwz · X
最近我在学习 AI 编程,顺手做了一个叫 AgentPK 的 AI 竞技游戏:你不用亲自操作,只需让 AI 写出战斗策略,Agent 就会自动对战、赢积分、冲排行榜;既能边玩边练习 AI 编程,也能直观看到自己的策略水平,欢迎大家来试试,也帮我提提意见!这里来试试:

Train your concentration with interactive games including Schulte Tables, Stroop Tests, and reaction time challenges.
Focus Game — 专注力训练小游戏集合,包含 Schulte Table、Stroop Test、Reaction Time Test 等浏览器训练工具

Compete in a Snake tournament where an AI agent writes your code and climbs the ranked ladder.
@MaikaUkin · X
Most snakes @cubicgameai see the next move. I built mine to think beyond it. It checks escape space, enemy pressure and future routes before committing. Sometimes the best move isn't toward food. Built with ChatGPT Pro 🐍 Still early, GUYS! 🚀 #SnakeS2

Use 100+ free online calculators for math, chemistry, physics, loans, health, and AI costs—no signup needed.
u/averageChilean · Reddit
Built a free tool site to help my brother study — now has 100+ tools, would love feedback My brother's in high school and needed something more visual to study chemistry, physics, and math, so I used Claude to build him a simple site with interactive calculators and visualizers. I'm not a programmer or from a tech background, so without AI this wouldn't have happened, at least not this fast. It ended up helping him a lot more than I expected, so I kept expanding it, added a bunch of other

Play 7 Takes, a card game of nerve and memory, against an AI dealer.
u/termicrafter16 · Reddit
A friend taught me a Slovenian card game two days ago. GPT-5.6 Sol helped me turn our argument into an AI opponent. Two days ago, a friend taught me Sedmice, a traditional card game we play in Slovenia. The rules are simple, but we quickly got into an argument about the best moves. Naturally, I decided the reasonable way to settle it was to build an AI opponent. I wrote out the rules, project specification, architecture, and implementation details, then handed the logic to GPT-5.6 Sol. Ab