stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.

vercel's frontend cloud gives developers the frameworks, workflows, and infrastructure to build a faster, more personalized web.

well organized and easy to understand web building tutorials with lots of examples of how to use html, css, javascript, sql, python, php, bootstrap, java, xml and more.

miro is a visual workspace for innovation where teams manage projects, design products, and build the future together. join 60m+ users from around the world.

learn to code — for free

a computer science portal for geeks. it contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview questions.

make the impossible, possible with trello. the ultimate teamwork project management tool. start up a board in seconds, automate tedious tasks, and collaborate anywhere, even on mobile.

obsidian is the private and flexible note‑taking app that adapts to the way you think.

boardmix博思白板，一个点燃团队协作和激发创意的空间，集aigc，一键ppt，思维导图，笔记文档多种创意表达能力于一体，将团队工作效率提升到新的层次。