I’ve been using the RawDigger image analysis tool for some months now. It comes in three editions, all of which are priced modestly. I recommend it for all shooters looking to get the best from their camera.
RawDigger is not a workflow tool so much as a feedback loop on your own technical success with exposure. For anyone doing ETTR, RawDigger provides a clear-cut answer as to whether the file is perfectly exposed, overexposed, or underexposed. But it has many other useful features, including a detailed EXIF info view that I prefer to just about anything else.
For me, the true raw histogram alone is immensely useful; I use it to check the actual exposure behavior of new cameras and to fine-tune my sense of what the camera histogram means*, and as well as to check for the amount of blow-out highlights far more clearly than the “blinkies” in some programs.
* Camera histograms are an abject design failure (Leica M Monochrom excepted); they force through white balance and a truncated color space, undocumented as to what is actually done, and are thus highly pessimistic on exposure, if not flat-out misleading. It is not uncommon for me to see a blown out exposure on a camera histogram that could have accepted another full stop of exposure, yet with zero loss of highlights. And auto exposure often leaves two stops of dynamic range unused. A very serious failure in design thinking, and by all vendors. See ETTR topics and A CALL TO ACTION: Build Intelligent ETTR Into Digital Cameras and Why Don’t Digital Cameras Offer a Perfect ETTR exposure?.