pe2shellcode
There are 3 repositories under pe2shellcode topic.
hasherezade/pe_to_shellcode
Converts PE into a shellcode
wabzsy/gonut
Generator of https://github.com/TheWover/donut in pure Go. supports compression, AMSI/WLDP/ETW bypass, etc.
onedays12/Convert2Shellcode
can convert EXE/DLL into position-independent shellcode