Docker从入门到实践 https://yeasy.gitbooks.io/docker_practice/
Google Android官方培训课程中文版 https://hukai.me/android-training-course-in-chinese/
《The Swift Programming Language》中文版 https://numbbbbb.gitbooks.io/-the-swift-programming-language-/
七天学会NodeJS https://nqdeng.github.io/7-days-nodejs/
免费电子书大全: https://github.com/vhf/free-programming-books/blob/master/free-programming-books-zh.md