x86 Assembly

University of Virginia Computer Science - x86 Assembly Guide
Intel x86 JUMP quick reference

x86_64 Assembly

Easy x86-64

Anti-Debugging

Beginners Guide to Basic Linux Anti Anti Debugging Techniques

Tools

Compiler Explorer ‐ C++^{See the assembly behind your C code!}
Binary Ninja Demo
IDA Evaluation Version

Tool References

GDB Cheat Sheet
IDA Pro Shortcuts