Ebook3000 - ebook3000.com is the best free ebooks download library.
Udemy - Online Courses - Learn Anything, On Your Schedule
PDF Drive - PDF Drive is your search engine for PDF files. As of today we have 79,233,950 eBooks for you to download for free. No annoying ads, no download limits, enjoy it and don't forget to bookmark and share the love!
DesignerUp - Not your average design and dev bootcamp.
DownTurk.net - download fresh hidden object, dash, match3, adventure, game, software, mobil applications for android, iphone, photoshop, movie, magazine, e-book, music"
Design Gurus - The ultimate resource to help you prepare for the system design and coding interviews.