
FreetCode — Free Algorithm Interview Prep
Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
Come study with me on
The full gallery
Tech stack
28 projects

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

Compete to write the cheapest zero-knowledge circuits and verify correctness in Lean.
rot256

Interactive demo for experimenting with grading mechanics.
@TheEduardoRFS · X
I vibe coded a demo for grading, not in a great shape but it's fun to play a bit.

Create and evolve mythological entities through simulated breeding and genetic rules.
@epcccc314 · X
受启发于希腊神话中的Eros 我基于哈希码和简化的遗传原理做了一个用来记录随便的神话故事和繁衍历史的网站,可以随意的创造,繁衍,以及让存在消亡或者复活,这些都在记述者的笔下和众口之中。所有都建立在哈希值之上命定之物,只有记述是任意的。欢迎大家来玩儿~

Generate interactive 3D worlds in seconds with text and photos using AI for games, research, and robotics.
ai world generator — 用文本和照片生成自然风光视频的 AI 工具网站

Deploy serverless AI models with a single line of code at competitive rates.
Synexa AI — 一行代码部署 AI 模型 (Replicate 50% 低价平替),Synexa 是运行无服务器 AI API 最具性价比的解决方案,提供业界最具竞争力的 A100 GPU 价格,相比其他服务商可节省高达 62% 的 AI 算力成本 - [更多介绍](https://github.com/1c7/chinese-independent-developer/issues/47

Analyze chess games with natural language explanations using an open-source browser tool with no login required.
u/ICARUS_2X · Reddit
Spent 7 months building a FOSS platform for natural-language chess analytics (No LLM) Hey guys, I've released CHONSE2, an open-source game review platform that offers unlimited analysis and move explanations without using hallucination-prone LLMs, running entirely in your browser. chonse2.com But Lichess is free, so why use this? Some have asked. It expands on Lichess's feature set a few different ways: Full analysis (accuracy/elo estimations/eval graphs, etc) requir

Learn to code and build projects through interactive games and challenges designed for the LLM era
@RahimNathwani · X
Not a direct answer but the guys at Exercism (non-profit that publishes really good and free programming language self-study courses) recently launched a separate site to teach junior programmers both vibe coding and software engineering fundamentals.

Write objectives and let AI agents (Claude, Cursor, Codex) decompose and execute coding tasks.
dudemanAtl · HN
PlanWright – A control plane for AI coding agents

Connect Gmail accounts to automate email sending and track opens and clicks.
@KenziChenBuilds · X
Hey! Developer behind Always looking for feedback to make it better.

Analyze crypto price spreads across 14+ exchanges in real-time to identify arbitrage opportunities.
@instantarb_io · X
Hi. Building a real-time platform for crypto arbitrage, funding rates, and market analytics.