
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

Organize notes and collections, ask questions, and generate podcasts and study materials.
mistakevin · HN
I've been working on https://notebooker.ai if anyone is interested in giving some feedback. I tried to post a Show HN yesterday with details about how I built it, but was auto-flagged and not sure what rules I broke. Everything that I've built on top of open-notebook, like the plugin system for your own "creators" (aka, podcasts, infographics, etc) is at https://github.com/Notebooker-ai plus a Cloudflare Worker AI deployer to play with different models. Been working on it for about six months.

Quiz game where you learn the ceremonial counties of England.
u/andoleal · Reddit
A tool to learn every county in England I wanted to learn the ceremonial counties of England, but could not find a good tool for that, so I vibecoded a quiz tool which turned out to be quite good (certainly better than I expected). It's called UK County Quiz: it shows you a county name and you click where it is on the map. Three modes — Classic (untimed), Timed (20 questions against a 10-second countdown), and Explore (hover over counties to learn names at your own pace). https://andolea

Transform YouTube videos into personalized AI courses with interactive lessons, quizzes, and flashcards.
@adirsluk · X
Building Falvox, an AI SaaS that turns YouTube transcripts into complete personalized courses.

Turn PDFs and lecture videos into AI-generated study guides, quizzes, and flashcards.
u/WindsOfRegret · Reddit
StudyFocus - A study tool that analyses your material and prepares tests for you! Title pretty much says it all. I build what I would consider a perfect study tool for myself, and I use it (almost) every day. It analyzes the PDF, lecture videos, etc. and creates study material, practice problems, shows step-by-step solutions to problems, creates flashcards, and creates tests. Link: studyfocus.ai submitted by /u/WindsOfRegret to r/SideProject [link]

Take a wellness quiz to discover your Change Creature and explore personalized wellness ideas.
@2cantsam · X
Spun this up in 4 days for work because I didn’t want to give higher schoolers another boring wellness tips handout. Needs more love, particularly the “explore” tab, but crazy how empowering vibe coding is.

Practice Java interview questions daily with a streak counter, no signup required.
@ByteCrafter2344 · X
Making practice as a habit.

Paste links, videos, or text and ask natural language questions to find what you saved.
u/Personal-Ad-131 · Reddit
Built a bookmarking app you can ask questions It's called Attic. You paste in links, videos or plain text. Later you can ask it things in normal language: "what have I been reading about lately", "what did I save and never open again". Each answer lists the saved items it used, so you can check it. It runs on your own API key (Anthropic, OpenAI or Gemini) Free while I work out what it should be. No card. Would like feedback on where to take this. Is asking questions about your own saved s

A daily art quiz where you guess painters and build a streak.
@stantokman · X
please destroy it

Convert study material into interactive games guided by an AI tutor.
u/darth_santos · Reddit
I built an AI app that turns any study material into a gamified learning journey Hi everyone! After several months of development, I'm excited to finally launch my project: Odyssa. The idea came from my frustration with reading long PDFs, taking notes manually, and forgetting what I'd learned. Instead of just summarizing content, Odyssa transforms your study material into a complete gamified learning journey powered by AI. You can upload PDFs, documents, and other learni

Your Cambridge IGCSE and AS revision companion: practise exam-style questions and get every answer marked point by point against the mark scheme. Start free.
@tommerwaldman · X

Create beautiful forms, surveys, and questionnaires without writing code. Drag, drop, and share in minutes.
@papertrailhq · X