As far as free RIP software goes, no, sorry.
RIP software is one of those things a professional shop needs, and costs money.
You can live without it, but only just.
I tried every way to get good film positives without a RIP, but the black ink on the film was always just too thin, and the halftones were hell to get.
Another thing RIP software does is halftones, and it makes getting halftones soooooo easy.
A shop needs some things to make a professional shop
A good press, good software for art, good estimating software, good film output, good light source,
RIP software is one of those capital expenses that are worth every penny.
With every film i print, with the RIP software, I know I will get good film positives, and I remember it cost $400-500.
I've printed 1000's of film positives, so the cost of each for the RIP software is pennies.
Well worth the piece of mind, and quality film positives.
Good film positives makes good screens!