The initial source comes from sdcuike/issueBlog#4
https://github.com/PacktPublishing free to download books code by Packet
https://github.com/EbookFoundation/free-programming-books Very immense
http://www.ituring.com.cn/book?tab=free Turing free books
http://ebook3000.com/Programming/index.html Not just it ebooks, including other areas, has ads
http://ebook-dl.com Either download or see films, interesting
https://scanlibs.com BAD ! download interval time is restricted
http://www.java1234.com/a/javabook/ Chinese site
https://www.iteblog.com/archives/category/ebooks/ focus on big data
https://www.packtpub.com Publisher
https://www.packtpub.com/packt/offers/free-learning One free book per day
http://www.oreilly.com/data/free/archive.html
https://www.pdfdrive.com Very Good ! many areas
http://ebook3000.com/Programming/index.html
http://proglang.informatik.uni-freiburg.de/teaching/concurrency/2014ws/
http://www.colorado.edu/cs/computer-science-course-archive
http://mindview.net/Books/DownloadSites/
http://inventwithpython.com/#invent
http://www.mhprofessional.com/
https://github.com/justjavac/free-programming-books-zh_CN
http://www.ituring.com.cn/book/ebook
http://itmanagersinbox.com/1875/13-sites-to-download-free-ebooks/
http://www.lemis.com/grog/Documentation/Lions/
http://www.tcpipguide.com/free/t_TCPConnectionTermination-2.htm
http://www.freesoft.org/CIE/Course/Section4/11.htm
https://landing.google.com/sre/book/
https://bushkarl.gitbooks.io/spring-cloud/content/
http://www.sonatype.org/nexus/resources/resources-book-links-and-downloads/
https://books.sonatype.com/mvnref-book/reference/index.html
http://book.huihoo.com/maven-the-definitive-guide/index.html
http://www.commandprompt.com/ppbook/ Practical PostgreSQL
http://use-the-index-luke.com/sql/table-of-contents SQL Performance Explained
http://math.hws.edu/javanotes/
http://aosabook.org/en/index.html The Architecture of Open Source Applications
They began with chorizo-style sausage made of pig and chicken, but eventually introduced other types. Burritos, bowls, tacos, quesadillas, and salads are the five primary menu items of Chipotle Mexican Grill. They provide products for everyone, from young children to senior citizens. Additionally, they include rice, beans, four varieties of salsa, sour cream, cheese, and lettuce as optional and completely free toppings. Along with soft drinks and fruit drinks, the majority of their eateries provide margaritas and beer.
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