
FreetCode — Free Algorithm Interview Prep
Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
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Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
Come study with me on

A daily puzzle game where you spot AI-generated errors to sharpen critical thinking.
u/CogniKing · Reddit
Play Parry — a 2-minute daily puzzle about catching AI's mistakes: spot the planted flaw, catch the answer that's lying to you I have been recently fascinated with puzzles as a way to help improve my BS-radar when using AI. I designed Parry to help with this - One puzzle a day - find the one flaw hidden in a confident paragraph, pick which of two AI answers actually helps you (one is subtly useless), call a claim true/false. Free, no account, nothing you input leaves your devi

Block distracting websites by solving math or coding puzzles.
hackitup7 · HN
TLDR built a Chrome site blocker that lets you into distracting sites only after you do some math or simple coding (JS only right now). Direct link to extension (the site just gives you more context): https://chromewebstore.google.com/detail/sphinx-earn-your-di... Philosophically it's a speed bump rather than a hard gate, because you'll eventually tear a gate down but you'll leave a speed bump. I've always eventually removed site blockers, or just had them become a nuisance that I reflexively dismiss before getting to distracting sites. Site blockers don't really reduce the "start navigating to a distracting site" muscle memory, and they eventually just become annoying. Dopamine is a hell of a drug. At the same time, I've been getting frustrated that my intermediate/advanced math skills have atrophied, and becoming more senior in my career (plus AI...) has caused my coding skills to atrophy even further. Realistically I'm not going to force myself to do math or coding exercises aft

Analyze your TikTok videos against baseline and niche benchmarks to identify winning formats.
@AnthonyCasauria · X
no human touched these — ViralVault's blog just shipped 2 more posts on autopilot. imaged, quality-checked, and published by the pipeline itself. 100-article backlog, chipping away. check it out → @viralvaultapp #buildinpublic #solofounder

Solve daily coding challenges with AI assistance and track your developer streak.
u/Administrative_Egg78 · Reddit
I built this because AI was making me a dumb&lazy engineer I noticed something sad about how I use AI. I was shipping faster, but practicing less. I could get answers quickly, but I was losing the habit of working through the fundamentals myself. So I built Unrot: short daily challenges for developers across languages, system design, architecture, data engineering, and other tracks. Game/xp and rewards system, a tiny bit competitive. No signup required to try it: https://unrot.dev

Interactive platform for learning data structures and algorithms with 300+ problems and visualizations.
u/Comfortable-Break-40 · Reddit
I spent a year building a DSA learning platform with 111 interactive visualizers. Would love feedback. A few years ago, I failed interviews at Google, Amazon, and Microsoft. The reason was simple: I could code, but I never properly understood Data Structures and Algorithms. I spent almost a year learning DSA after that. During that time, I realized I don't learn by memorizing. I learn by building. And I couldn't find a tool that taught DSA the way I wanted to learn it. So I

Solve math problems and collaborate with peers using AI assistance.
lemma1729 · HN
Hi HN, This is ProofTree, and in TLDR: it is a platform where you can chat with an AI to do math, the way you already do, with context-awareness and knows how you personally do math, connected to the fora of other live human mathematicians. So, when you are talking to an AI about a proof at 3 am, and you need a human expert looking at it, or a discussion around it, like you do on StackExchange, this is it! You need an approved email account to use it, so please write here if you would live to try it out.

Compete against Claude AI in timed coding challenges judged on speed, correctness, and code quality.
u/Easy-Visit-3934 · Reddit
I built a coding platform where you can compete with Claude on various coding problems, it evaluates based on speed, correctness and code quality Link: https://www.duelai.dev/ Feel free to give it a try and let me know what you think! submitted by /u/Easy-Visit-3934 to r/SideProject [link] [comments]

Filter AI-generated resume spam from hiring workflows to focus on genuine candidates.
romanhn · HN
AI resume spam ruined hiring so I built a tool to keep the bots out

Analyze X and TikTok content performance and auto-generate AI growth strategies.
u/AISaas_ · Reddit
Honest feedback for my updates Hey all, I launched my saas back in February and had alot of traction in the beginning and still to this day, 0 paying customers. Im not sure if its a feature/do people really want this issue or a landing page issue to capture the 'aha' moment. It's a social content growth saas helping users grow using their own data, their own personal growth coach and insightful analytics. Recent updates are: - instagram api integration - UI update - whats w

Accountability app with an AI rival that trash-talks and duels with you weekly to push goal completion.
@nemesis_goals · X
Building an AI goal tracker that hates your excuses and roasts your failures.

On-chain intelligence platform providing market signals and data for AI agents.
@BlockBeatsAsia · X
🚀BlockBeats Pro 正式上线,一次订阅解锁律动全站服务🎉🎉 过去几周,不少用户发现律动陆续上线了新板块——链上数据、预测市场解读、TradFi情报、AI 信息流……也一直有人在问我们:这些内容能不能打包看,如何自主筛选想看的内容? 现在它来了,BlockBeats Pro➡️ 1⃣链上溯源 + 内幕地址捕捉 2⃣PolyBeats预测市场全量分析 3⃣TradFi 跨市场情报,休息日也不断更 4⃣AI行业信息流 + 深度研报 5⃣TradingBeats即将解锁,最棒的链上Perp与地址分析工具 一个账号,覆盖链上到传统市场、从数据到解读的完整闭环。性价比拉满🔥🔥