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

the main openbsd page

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.

博客园是一个面向开发者的知识分享社区。自创建以来，博客园一直致力并专注于为开发者打造一个纯净的技术交流社区，推动并帮助开发者通过互联网分享知识，从而让更多开发者从中受益。博客园的使命是帮助开发者用代码改变世界。

q&a for ubuntu users and developers

your home for data science. a medium publication sharing concepts, ideas and codes.

oracle offers a comprehensive and fully integrated stack of cloud applications and cloud platform services.

build software development skills with ai-powered courses. prepare for tech interviews, explore aws cloud labs, and master in-demand technologies with the interactive online platform used by 2m+ developers.

tutorials point is an online learning platform providing free tutorials, paid premium courses, and ebooks. learn the latest technologies and programming languages sql, mysql, python, c, c++, java, python, php, machine learning, data science, ai, prompt engineering and more.

in-depth, to-the-point tutorials on java, spring, spring boot, security, and rest.