Shellcodecs is a collection of shellcodes, loaders, sources, and generators provided with documentation designed to ease the exploitation and shellcode programming process.
You can download it from the following link: https://packetstormsecurity.com/files/download/121852/shellcodecs.tar.gz
Source: https://packetstormsecurity.com/files/121852/Shellcodecs-Shellcoding-Toolset.html