https://github.com/anandatheerthan/ABAP-1
https://github.com/abramsba/AbapExamples
https://github.com/moreus/ABAPDesignPattern
https://github.com/rvanmil/ABAP-OOP-Library
https://github.com/rvanmil/ABAP-Regex-Training
https://github.com/abapzombie/ABAP-Toolbox
https://github.com/abapzombie/ABAPZombie-Code-Library