This link might help you:
From the link:
Inferno is not only an operating system, it is also a complete development environment, providing all the tools necessary for creating, testing and debugging the applications that run within it.
Acme IDE: includes editor, shell, advanced pattern matching tools & more
Fast Compiler: with full syntax and compile time type checking
Graphical Debugger: with full stack trace for currently executing threads
Powerful Shell: with sophisticated scripting capabilities UNIX like commands: including bind, grep, gzip, mount, ps, tar, yacc...