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.

awe-inspiring science reporting, technology news, and diy projects. skunks to space robots, primates to climates. that's popular science, 150 years strong.

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

adblock is one of the most popular ad blockers worldwide with more than 60 million users on chrome, safari, firefox, edge as well as android. use adblock to block all ads and pop ups. adblock can also be used to help protect your privacy by blocking trackers. adblock blocks ads on facebook, youtube, and all other websites. download it for free now!

science news features news articles, videos and more about the latest scientific advances. independent, accurate nonprofit news since 1921.

知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视、时尚、文化等领域最具创造力的人群，已成为综合性、全品类、在诸多领域具有关键影响力的知识分享社区和创作者聚集的原创内容平台，建立起了以社区驱动的内容变现商业模式。

bing helps you turn information into action, making it faster and easier to go from searching to doing.

全球最大的中文搜索引擎、致力于让网民更便捷地获取信息，找到所求。百度超过千亿的中文网页数据库，可以瞬间找到相关的搜索结果。