Package bash script in "executable" for double-click execution (ideally platform independent)?

Question

I wrote a number of bash scripts that greatly simplify the routine, but very tedious, file manipulation that my group does.

Unfortunately, most in my group cannot open a terminal, let alone run scripts with complex arguments.

Is there a way to nicely package a bash script into an executable (that accepts arguments) that runs nicely on multiple computer platforms?

I run Mac OS X, but many of my colleagues run Windows (which can run bash scripts via Cygwin, etc.). I am aware of Platypus, but is there an equivalent for Windows?

Thanks.