I mentioned these FREE ebooks back on Programmer’s Day, but I feel that they merit their own post: GoalKicker.com has a great collection of FREE ebooks featuring programming recipes for all sorts of platforms, from Angular to Android, C to C++ to C#, Java to Kotlin, MongoDB to MySQL, Perl to PHP to Python, Ruby on Rails to React, Swift to Xamarin Forms and more!
You can download them for free here, but if you’re feeling really grateful and generous, you can buy them one or more coffees!