Free Academic books, Resources and Archives

Sometimes, you are challenged by some material resources for learning something, referencing or knowing how stuffs work. It might need some earlier inventions and archives that are available on what you require, for academics and researchers.

Here are a few links which I have found useful over the years:

https://archive.org/

https://arxiv.org/

https://www.researchgate.net/

https://www.academia.edu/

http://book4you.org/ireader/928219

http://www.libramar.net/news/naval_architecture_design/1-0-2

https://www.scribd.com/

http://libgen.io/scimag/

http://sci-hub.cc/

http://sci-hub.bz/

http://gen.lib.rus.ec/

http://bookzz.org/

http://booksc.org/

http://www.survivorlibrary.com/?page_id=1014

https://ocw.mit.edu/courses/mechanical-engineering/2-017j-design-of-electromechanical-robotic-systems-fall-2009/lecture-notes/

Another way is through online forum like:  egpet.net, faadooengineers.com and cfdonline.com

With twitter, you can also find papers by sending a message with the name of the paper you want or the DOI and adding "hashtag HAZIT" ....

Lastly, you can get from Google too, some books that google projects have are for free. Some can also be through your university library, such as https://kritikos.liv.ac.uk , http://www.librarysearch.manchester.ac.uk/ , http://onesearch.lancaster.ac.uk/