
Brain Speed Test
Test your cognitive speed across reaction, decision, focus, memory, and inhibitory control.
@MuttyRab · X
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60 projects

Test your cognitive speed across reaction, decision, focus, memory, and inhibitory control.
@MuttyRab · X

Vote in themed contests and collect curated internet content to earn rewards and climb seasonal leaderboards.
@ramtinrhmti · X
check that out

Scan web apps for vulnerabilities like SQL injection, XSS, and broken access control with AI-powered automated penetration testing.
@OvadiaYove9462 · X
Too many security issues in vibe coded apps, so I built Automatic AI pentester, crawls and scans your site, runs a full suite of exploit tests, and uses AI to verify each one (cuts false positives) Full report, dashboard, and AI-ready fix instructions

Test your product idea against AI-simulated focus groups matched to your target audience.
@product_luke · X
Free roast, no signup. Reply with your landing page URL. I'll run it through -- 50 AI-simulated customers from YOUR target audience -- and post the verdict here: → score /100 → top objections → the single most brutal verbatim quote First 10 replies. Fair warning: 15% of the panel are hard rejectors. They don't do mercy.

Turn your study notes into competitive quiz battles and get AI coaching on weak topics.
u/Due_Load6189 · Reddit
I built a study battle app and need honest feedback Hey everyone, I’m a student building StudyClash, an app that turns practice questions into competitive study battles. You can try a deck, answer questions, get a score, see what topics you’re weak in, and use an AI coach to understand mistakes. I’m not trying to sell anything right now — I just need honest feedback before I show it to more people. Main things I want feedback on: Is the app easy to understand? Does anything look b

A free interactive wheel that spins to give you random yes or no answers for decision-making.
Yes or No Wheel — Spin the Yes or No Wheel - Get Your Free & Instant Decision - Struggling with a decision? Spin our free Yes or No Wheel for an instant, random answer! It's the simple, fun, and fast

Paste a URL to instantly preview your project in device mockups.
@AndreaPericoli · X
I couldn’t find a simple tool that did exactly what I needed, so I built one in @Lovable Frame Stage lets you paste a URL and instantly preview your project on desktop, tablet, or mobile. No mockups. No setup. 🌐 #vibecoding #AI

Test startup ideas against AI personas to receive validation feedback in minutes.
@gaurangbuilds · X

A private 100-question Rice Purity Test with browser-local scoring, no account required.
lby910722 · V2EX
一个隐私优先的 Rice Purity Test: 100 题、浏览器本地计分 最近做了一个独立的 Rice Purity Test: https://testricepurity.org/ 它面向 18+ 用户,包含 100 道原创 Yes/No 题目。答题进度和分数只保存在浏览器本地,没有账号、服务器端答案存储、分析脚本或广告脚本。结果页还提供浏览器本地的模式报告和好友挑战(只把加密分数放在 URL fragment ,不上传答案)。 我也尽量把边界写清楚:这是娱乐/自我反思工具,不是心理测量、诊断或道德评价,也与 Rice University 无关。当前支持英语、西班牙语、法语、德语、葡萄牙语、日语、韩语和简体中文。 欢迎试用,也想听听大家对隐私说明、移动端答题流程和结果分享设计的意见。


Independent model readings, explicit disagreement, human decision gates, and verifiable research receipts.
@chatmouthai · X

Create comic strips by typing descriptions with automatic character placement and dialogue bubbles.
ChrisPirillo · HN
I rebuilt Microsoft Comic Chat's layout engine in one HTML file