I prefer well written, well working, well documented and packaged software that solve problems, not tcl scripts or any other shell scripts that is very difficul

I prefer well written, well working, well documented and packaged software that solve problems, not tcl scripts or any other shell scripts that is very difficult to maintain. shadowd/shadowc is exactly the tool that generates X different salted hashes and distributes it to remote sites, as you described. It embeds to any infrastructure almost painlessly.