AuI ConverteR 48x44 is a converter for high resolution music files for audiophiles. It can handle DSF, DFF, ISO, WAV, AIFF, FLAC, ALAC, and WMA, as well as ripping CD's and editing DSF/FLAC tags.
Free version main limitations: batch processing; output DSF files and files converted from ISO/DSF/DFF have a 2-second pause in the middle.
Paid versions remove these restrictions. The pricing schema can be found here.