Many years ago, back in the days when I didn't own a DSLR, I found some website which regularly posted random RAW photos for contestants to convert/develop (or whatever it is called in English). Everybody posted his result and then there was a voting. I was in awe for how well people were producing different moods and different accents using the very same raw photo. Unfortunately, either this website doesn't exist anymore, or I'm unable to find it.
Today, I'd like to show something similar to a fellow photo enthusiast, to get him hooked on the topic of raw conversion. However, it seems that I'm lacking the talent to create a whole collection of sufficiently diverse conversions of the same raw photo on my own. Also, my Google-fu was only good enough to discover some Australia-themed website with relatively boring raw photos and little inspiring contest entries.
Can you recommend a website with good raw conversion contests that is fit for the purpose described above? A bonus would be if they have some special affiliation with free software raw converters like RawTherapee or Darktable.