There are 3 repositories under shell-generator topic.
A powerful reverse shell generator
Automatic reverse/bind shell generator cheat sheet.
ShellValley is a user-friendly reverse shell generator tool, specially designed for CTF players who prefer to stay within their terminal while generating reverse shells swiftly.
Fel Fel Framework or Fel Fel shell 🐚 . \n is a powerfull framework for creating shells ( bind shell , tcp shell , udp shell , reverse shell )