Reverse Engineering for Beginners: https://www.begin.re/
Learning Radare2 by Reversing a UMPC Bios: https://stragedevices.blogspot.com/2019/02/finding-verified-intel-atom-msrs-in.html
Survival guide for Radare2 with practice: https://github.com/ZigzagSecurity/survival-guide-radare2
http://www.capstone-engine.org/showcase.html
Reverse engineering simple binaries created in Fortran, C, C++, Pascal and Ada: https://www.mkdynamics.net/current_projects/computer_security/Disassembling_binaries/disassembling_binaries.html