Yes, but not as polished. RawTherapee has built-in film simulation profiles. Darktable offers "filmics" modules. For Lightroom, try The Classic Presets - Free Sampler or Mastin Labs' free trial (similar quality to RNI).
Before we hunt for a download, we need to understand the product. RNI (Really Nice Images) is a company founded by professional photographers who were obsessed with analog film stock. They didn't just slap a grain texture on a photo; they chemically profiled actual film rolls. rni films lightroom presets free download verified