You'll have to excuse this if it's messy, doing it on my mobile!
10 development ebooks for free, simply sign up no credit card needed.
Book titles (links are to reviews not the deal)
Build Mobile Websites and Apps for Smart Devices
CSS Master
Full Stack JavaScript Development with MEAN
HTML5 & CSS3 for the Real World: 2nd Edition
JavaScript: Novice to Ninja
Jump Start HTML5
Outsourcing Web Projects — Not Amazon link..
PHP Master: Write Cutting-edge Code
The Principles of Beautiful Web Design, 3rd Edition
The WordPress Anthology
[EDIT] Updated book titles to include links to Amazon (better for reviews IMO) with the exception of Outsourcing Web Projects
Anyone got direct links?