Iridient Developer is arguably the best RAW converter for Fuji X-Trans raw files. About a month ago I tested Iridient 2.1 and was really impressed. My review is
here. The latest 2.2 update brought additional features, improvements and bug fixes for Fujifilm X.
New Features:
New, smoother "Soft Look" demosaic option for Fuji X-Trans models.
Added support for Fujifilm RAW daylight, cloudy and tungsten white balance presets for most recent models.
Added support for automatic RAW lens distortion and vignetting correction metadata for many Fujifilm models.
Support for Fujifilm X-M1
Improvements:
Modified tone curve and baseline exposure for Fujifilm X-Trans models to better match other software and camera JPEGs.
EXIF 2.3 lens model information should now be displayed in Preview window for many more camera models, including the Fuji X-Trans models.
Bug Fixes:
Fixed bug with "Soft Look" checkbox and the Fuji X-Trans cameras. Now, like with Bayer/Foveon RAW models this option enables an alternate, smoother demosaic (RAW interpolation) method.
Fixed ISO gain adjustment for Fuji X-Trans models at ISO 3200 and 6400.:
Full Release Notes
I quickly compared Iridient 2.2 to Aperture 3.4. 5 and Lightroom 4.4