https://github.com/EbookFoundation/free-programming-books/blob/master/free-programming-books.md
Index
ABAP
Ada
Agda
Alef
Android
APL
Arduino
ASP.NET MVC
Assembly Language
Non-X86
AutoHotkey
Autotools
Awk
Bash
Basic
BETA
C
C#
C++
Chapel
Cilk
Clojure
COBOL
CoffeeScript
ColdFusion
Component Pascal
Cool
Coq
Crystal
CUDA
D
Dart
DB2
Delphi / Pascal
DTrace
Eiffel
Elasticsearch
Elixir
Ecto
Phoenix
Elm
Emacs
Embedded Systems
Erlang
ESP8266
F#
Firefox...
