Print Spooler product on UNIX?

HI all,

I was looking for Print Spooler products for Unix. Basically our requirement is to be able to send jobs to the spool "holded", change printing properties, view a list of jobs to be printed (based on some criteria), send a job to be printed (release) and view the contents of a specific job.

The product should have a CLI for working with the spool (i.e we do not need any GUI, it is to integrate the product with a current legacy system migrated from mainframe)

I have found XI-TEXT as one alternative. Any others out there?

Regards
Andr�s B.

I've used the standard lp command set, but also Zeh does a fantasic job with plot spooling.