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

Get AI advice on crop and livestock problems in 20 languages, then connect with local vets and agrovets.
@AdrianAbiu50413 · X
Check out what I just built with Lovable!

Post real problems, let communities validate demand, and explore developer-proposed solutions.
@cultkoushik · X
A problem warehouse for creators

Play Sokoban in your browser and watch an AI solver crack it. A plain-JS port of a native C++ engine, it returns the provably optimal (fewest-move) solution, entirely client-side.
enjoyyourlife · HN
Sokoban AI Solver

Get AI diagnostic reports for cars, trucks, boats, and HVAC to know repair needs.
@AsphaltCowb0y · X
My trucks kept breaking. That’s the origin story. No garage, no shop room. A fleet of semis that wouldn’t stay running, and me trying to figure out why before the repair bills ate the month. So I built with Claude Code. It worked. Then I hit the wall every builder hits: I needed more compute than I could afford. Started Intent Solutions IO LLC, got accepted into the Google Cloud startup program, and got a pile of credits. Sat on them for months because I didn’t want to burn them on something dumb. Then Claude Code plugins shipped. Then skills. I bought for twelve dollars. Twelve. Then Anthropic shipped skills, so I grabbed Then Cowork, so I grabbed that one too. All three now point at I was still driving to make the bills. Kids’ soccer doesn’t pay for itself. Still driving today as I type via voice to text. Today that’s 470 plugins, 3,068 agent skills, 347 agents, 49.9K installs, 2,593 sta

Type a math problem and get step-by-step walkthroughs with explanations.
u/peterparkermarker · Reddit
MathIQ I built mathiq.io with Claude Code because I wanted a way for students struggling with college level maths to see how the problems can be broken down and not as intimidating. Each walkthrough goes from beginning to end and each step has a "why and how?" feature. Anon users get 1 free daily walkthrough powered by Haiku 4.5. Signed in users get 3 free daily walkthroughts powered by Haiku 4.5. Plus users get 5 Opus 4.6 walkthroughs plus 20 Sonnet 4.6. Pro users get 8 Opus/30

Paste a URL. Get the one issue that actually matters, in plain English, with a fix prompt you can paste straight into Cursor or Claude.
u/Salty-Excitement-107 · Reddit
Free security + AI visibility scan. No signup needed. Just finished a project called [Shipleak]( https://www.shipleak.com ). You paste a URL, it runs 65 checks against the live site, takes about twenty seconds. Headers, TLS, cookies, CORS, DNS and email records, common exposed paths, and anything that looks like an API key sitting in your JS bundles. Then the AI visibility half: structured data, whether your content exists before JavaScript runs, whether AI crawlers are allowed, llms.txt. Eac

Send AI agents to tackle open math problems and earn bounties on verified solutions.
timqian · HN
Send your agent to solve open math missions

Identify socket sizes by photographing bolts or nuts with your phone.
@FirstDeployAI · X

Torqmind is an AI-powered automotive diagnostic assistant that helps DIY mechanics and professional technicians diagnose OBD-II trouble codes, vehicle symptoms, drivability issues,
u/Beginning_Fly_9315 · Reddit
I built Torqmind – an AI-powered automotive diagnostic assistant. Looking for honest feedback. Hi everyone, I’ve been building Torqmind , an AI-powered automotive diagnostic assistant for DIYers and mechanics. The idea came from seeing how generic most online repair advice is. You search an OBD-II code or symptom and usually get a long list of possible causes with very little guidance on what to check first. My goal is to make diagnostics more practical by letting users select their vehic

Tiny, precise browser tools for contact centre agents — SLA timer, discount calculator, NATO phonetic, ticket age checker, and an AI tone softener. Free, no login, no installs.
@tooleaseapp · X
Tools for contact centre staff in one place

Daily medical diagnosis puzzle game for clinical reasoning practice and exam prep.
Doctordle — 每日医学诊断游戏,包含线索揭示、病例档案及临床推理练习功能,适用于美国医学考试(USMLE)备考与分散式复习