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Exercism Learning Free, open-source platform to practice coding across dozens of languages with optional mentorship. Nonprofit Login Required Mobile Limited Lucide Design Open-source SVG icon library with a consistent, customizable icon set. Nonprofit Login Not required Mobile Supported Brilliant Learning Interactive courses that teach math, science, and computer science through hands-on problem solving. Company Login Required Mobile App recommended MDN Web Docs Development The official reference for HTML, CSS and JavaScript Nonprofit Login Not required Mobile Supported NotebookLM AI Tools A Google AI notebook that answers from your sources Company Login Required Mobile Supported W3Schools Learning Beginner-friendly web development tutorials with an in-browser code editor. Company Login Not required Mobile Supported GitHub Development The de facto standard for hosting and collaborating on code Company Login Optional Mobile Supported npm Development The central registry for JavaScript packages Company Login Not required Mobile Supported Docker Hub Development The main registry for container images Company Login Optional Mobile Supported Canva Design Template-based graphic design anyone can use Company Login Required Mobile App recommended GitLab Development All-in-one DevOps platform with powerful CI/CD Company Login Optional Mobile Supported Perplexity AI Tools An AI search engine that cites its sources Company Login Optional Mobile App recommended MIT OpenCourseWare Learning Free lecture notes, exams and videos from MIT courses. Nonprofit Login Not required Mobile Supported Pexels Design Free stock photos and video Company Login Not required Mobile Supported Kaggle Learning A data science community with datasets, notebooks, competitions and short courses. Company Login Optional Mobile Supported Coursera Learning University and company courses online Company Login Required Mobile Supported Cal.com Productivity An open-source scheduling platform for booking meetings. Company Login Optional Mobile Supported Khan Academy Learning Free lessons from math to science Nonprofit Login Optional Mobile Supported OpenStax Learning Free, peer-reviewed textbooks for introductory college and AP-level subjects from a nonprofit at Rice University. Nonprofit Login Not required Mobile Supported Unsplash Design High-quality free photos Company Login Not required Mobile Supported TickTick Productivity Cross-platform to-do list and calendar app for tasks, habits, and reminders. Company Login Required Mobile App recommended HackerRank Learning A practice platform for coding challenges, skill certifications, and interview prep. Company Login Required Mobile Supported Pixabay Design A large library of free photos, illustrations, videos and audio under the Pixabay License. Company Login Optional Mobile Supported Replicate AI Tools Run open-source AI models through a hosted API without managing GPUs. Company Login Required Mobile Supported Zotero Productivity A free, open-source tool for collecting, organizing and citing research sources. Nonprofit Login Optional Mobile App recommended DataCamp Learning An interactive learning platform focused on data skills, where lessons are completed by writing code in the browser. Company Login Required Mobile Supported Wolfram|Alpha Learning A computational engine that answers math, science and data questions directly. Company Login Optional Mobile Supported OpenRouter AI Tools A single API and account for reaching many AI models from different providers. Company Login Required Mobile Supported Tailwind CSS Development A utility-first CSS framework with official documentation. Company Login Not required Mobile Supported TED Learning TED's site for watching talks on a wide range of topics. Nonprofit Login Optional Mobile Supported Desmos Learning A free online graphing calculator and math tools. Company Login Optional Mobile App recommended CS50 Learning Harvard's introductory computer science course materials, available online. Nonprofit Login Optional Mobile Supported Boot.dev Learning An online platform for learning backend development through hands-on coding courses. Company Login Required Mobile Supported Sentry Development An application monitoring platform for tracking errors and performance issues in code. Company Login Required Mobile Supported