Learn to code 🚀

Skip the fluff. Quick, copy-paste cheat sheets that get you writing real code fast. Start free with Python — more languages on the way.

💻 Programming Languages

Ranked by real-world usage. Live Run/Submit sandboxes where a free execution engine exists; honest reference guides where it doesn't.

💻 See every language cheat sheet
Python, C, C++, Java, C#, JavaScript, SQL, Rust & 21 more — ranked by real usage, each with its own free cheat sheet.
See all languages →

🎓 Coding Interviews

Prep material outside the language ranking above.

💼 Coding Interviews
Two pointers, sliding window, BFS/DFS, DP — with Python solutions & Big-O. A taste is free; reveal any locked solution for 10 ⭐, or go full with Premium.
Open cheat sheet →

🛠️ IDEs

Which editor actually fits the language and job you're doing.

🛠️ Which IDE should you actually use?
VS Code, IntelliJ, PyCharm, Jupyter/Colab, Visual Studio, Eclipse, CLion, Android Studio, Xcode & Vim/Neovim — ranked, with what each is genuinely best at.
See the guide →

🗄️ Databases

Which database actually fits the job — ranked by real usage.

🗄️ Which database should you actually use?
PostgreSQL, MySQL, SQLite, SQL Server, Redis, MongoDB & 24 more — ranked by real usage, with what each is genuinely built for.
See the guide →

📋 Code Documentation & Collaboration

Version control, project tracking & docs tools — ranked by real usage.

📋 Which collaboration tool should you actually use?
GitHub, Jira, GitLab, Confluence, Notion, Miro & 19 more — ranked by real usage.
See the guide →

🤖 Large Language Models

Which AI model actually fits the job — ranked by real usage.

🤖 Which AI model should you actually use?
OpenAI GPT, Claude Sonnet, Gemini, DeepSeek, Llama, Mistral, Grok & 10 more — ranked by real usage.
See the guide →

💬 Developer Communities

Where developers actually ask questions and learn from each other — ranked by real usage.

💬 Where should you actually go for help?
Stack Overflow, GitHub, YouTube, Reddit, Discord, Dev.to & 12 more — ranked by real usage.
See the guide →

🔥 Trending Tech & AI Tags

The fastest-rising Stack Overflow tags of 2026 — ranked by real usage.

🔥 What's trending in tech right now?
Google Gemini, LLMs, RAG, Ollama, Tailwind CSS 4, .NET 8+, Pydantic, LangGraph & 12 more — ranked by real usage.
See the guide →

🌐 Web Frameworks & Technologies

Runtimes, frontend libraries & backend frameworks — ranked by real usage.

🌐 Which web framework should you actually use?
Node.js, React, Next.js, Express, ASP.NET Core, Angular, Django, Laravel & 20 more — ranked by real usage.
See the guide →

☁️ Cloud & Dev Tools

Containers, package managers, cloud platforms & infrastructure tools — ranked by real usage.

☁️ Which cloud & dev tools should you actually use?
Docker, npm, AWS, Kubernetes, Terraform & 37 more — ranked by real usage, with what each is genuinely built for.
See the guide →

🏫 College & High School Tracks

High schools first — ranked, then most popular, then most enrolled. Colleges follow the same order.

High Schools
🔬 #3 Best STEM High School in America
BASIS Independent Silicon Valley's track — AP CS A, an Advanced Java + ML capstone, then real independent research.
See the track →
🏫 The most famous & selective public high school
Stuyvesant's unusual track — Racket & NetLogo first, then Java/AP CS A, then C systems electives.
See the track →
🏙️ The most-enrolled public high school (largest campus)
Brooklyn Tech's real CS track — AP CSP, AP CS A in Java, then a full Computer Engineering major.
See the track →
Colleges
🎓 One of the top-ranked CS programs in the world
A real walkthrough of CMU's intro CS sequence — the languages, tools, and signature assignments (Bomb Lab, Malloc Lab and more) — with links to build each skill yourself.
See the track →
🐻 The most applied-to (most popular) college in the country
UCLA's real CS track — C++ from day one, then data structures, then Linux/shell/Git in Software Construction.
See the track →
🐴 The most-enrolled college (largest physical campus)
Texas A&M's real CS track — C++ program design, then structured C, then data structures & algorithms.
See the track →

🧭 Careers

What CS/IT jobs actually look like day to day.

🧭 What do CS/IT jobs actually do all day?
Software developer, data scientist, cybersecurity analyst, DBA and more — real daily tasks, example projects, tools, and 2024 median pay.
See career tracks →
🏛️ Curious about government tech jobs specifically?
State IT jobs work on DMV systems, tax portals, benefits systems and more — with a clear, stable entry-to-senior career ladder.
See state IT jobs →
More languages, school tracks & advanced cheat sheets are on the way. Want one next? Use the chat to tell me!
🎤 Watch a full mock coding interview
A complete 45-minute session narrated end-to-end — OOP design, a dynamic-programming algorithm, and behavioral questions — with coaching notes on why each move works. Free.
Read the walkthrough →
Unlock everything with Premium 🚀
Each section gives a free taste (Easy/Medium/Hard). Premium unlocks all material, the AI coding tutor, mock interviews & every Solve-it problem — $9.99/mo or $59.99/yr. Or reveal any single locked question for 10 ⭐ credits.
See Premium →