I shoot consistently in RAW and let the photos since version 5 (2008) Duch DxO "develop" and processed. The image editor GIMP, I prefer parallel approach to dealing with my images, I use only for special cases such as channel exchange in infrared images.
The current version 9 has the noise reduction compared to previous versions improved once again. I take pictures with the "high-end" compact Nikon P7100. Was previously at ISO 400 final, I now achieved satisfactory results even at ISO 800 and even in 1600th