
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

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

Compress LLM prompts and docs to reduce token usage and API costs.
@marcusyul · X
THEY JUST GAVE AWAY 100 MILLION FREE TOKENS SO YOU CAN STOP BURNING THROUGH YOUR CLAUDE CODE BUDGET. if you code with AI you already know: the session fills up, starts failing, and on top of that you're overpaying there's a tool that fixes this: it shrinks the context before the model even sees it same model, same response, a fraction of the cost in a real session: from $154 to $43. a 72% drop and right now: → extend your Fable sessions in Claude Code → 100M free tokens to try it out you don't switch models you don't touch your code you just stop paying to repeat yourself link below ⬇️

Convert PDFs, scans, emails and screenshots to organized Excel or CSV with AI.
Messy2Sheet — AI 文档转表格工具,把截图、邮件订单和 PDF 价格表按自定义字段整理成 Excel/CSV,支持保存可复用 Recipe

Translation management platform with agent-native workflows for shipping multilingual apps.
@sacsandc4 · X

LeetCode-style Python practice for agentic AI interviews covering ReAct loops, RAG, and tool calling.
@notunknownkyun · X
- leetcode style interview prep for agentic AI interviews and unskilling folks.

Detect whether text was written by AI tools like ChatGPT, Claude, or DeepSeek.
AI Detector — 检查你的文本是否 AI 生成

Transform study materials into concise notes and diagrams with AI assistance.
Turbo Learn — 从文档、图片、拼音文件生成笔记的 AI 学习工具网站

Create richly formatted posts and publish them instantly to the web with a single click.
@masafumiohta · X
I’ve been using Windows as my daily use lately despite I have been using Mac/Linux for a long time, but I keep running into all sorts of issues, so I’ve been fixing them vibe-coding with Claude. I’m gonna dump all that stuff on This blog is fully automated with Claude Code, from coding all the way to reporting. It’s nothing special—anyone could do it—but it’s actually pretty fun once you try it. The only annoyed is that it burns through tokens like crazy. Most of the tips are pretty interesting, so I hope you find them useful.

Generate accurate APA, MLA, Chicago, Harvard and IEEE citations from URLs, DOIs, or ISBNs.
colin_peterson · Product Hunt
Corroba - Free, accurate citation Cite AI, Verify Links, How To Cite

Unscramble word tiles to solve puzzles in this word game.
@JRABARA1 · X
Mid-Century Teak Scramble download freighter app, dm your wallet serves as feedback :)

An AI-powered platform for solving and collaborating on math problems in a social context.
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.