Unix Utilies for Windows
If you want to install Perl on Windows or do anything vaguely sophisticated in the brain-dead command line shell of Windows (a.k.a. the DOS prompt), then you need a collection of commonly used UNIX utilities that can run under Windows.
I have put together such a collection of the most popular UNIX utilities and a few other command-line programs. Most of these are GPL-licensed (i.e. open source) and the remaining few are free-ware (but not open source). Either way, you can do with these programs whatever you want.
Oracle DBMS_PIPE - why you should abandon it
A classical method of getting Oracle-based processes communicating with the outside world is by using the DBMS_PIPE package: Typically, we write to a pipe from an Oracle PL/SQL-based process, and then we continuously run an asynchronous Oracle PL/SQL process which reads the pipe and processes what it reads. A common use of DBMS_PIPE is for debugging, logging and launching external processes.