In RawTherapee has a built-in file Manager with pictures. Files can evaluate and assign tags - then do the sampling estimated and allocated to the labels. There is batch processing function (conversion). Supported the compare mode, in which the left displays the original image, and the right has already been processed.
RawTherapee supports images in JPEG, PNG and TIFF.
To install RawTherapee you can use repositories. On the programme website for the major distributions are given appropriate instructions. You can also download RawTherapee in the form of ready package (downloaded zip-file with all the required files).
The program is available for Linux, Windows and Mac OS X.
sudo add-apt-repository ppa:dhor/myway sudo apt-get update sudo apt-get install rawtherapee