Another nugget of gold:
Raw Photo Processor:
http://www.raw-photo-processor.com/RPP/Overview.html
I have really been looking for a stripped down, utilitarian raw conversion tool that gives me the direct control of dcraw, but with some more access to the data and, frankly, a GUI. Not only does Raw Photo Processor (RPP) provide this, it gives the user a whole new level of access to raw data that I have not found elsewhere. Granted, this is appealing to a nerd like me, but nonetheless, you will really find this kind of tool useful - at least I do.
The histogram is one of the most useful tools in the app, including luminance, rgb and the adams zone system, with the ability to click on the image and have the histogram show you the location of that pixel on the histogram (L, R, G and B and EV in each color channel) as well as the amount of exposure compensation required to shift that pixel to all of the other zones. There are also other great features like a gamut diagram to check your image data against the color profile of your choice (need to know if your image fits into your working space in PS or into the gamut of your printer-paper profile?). Also, there is a nifty "Optimize for post processing on Save" option that will automatically compress the tonality of the image to give you room in the ends of the histogram, as well as reduce the saturation so that you can bring the image to its final state in post - like PS. Having WB in terms of multipliers is also more informative if you want to know what the converter is doing to your data. The amount of EXIF the app reads is extensive, to say the least.
In addition, should you make a donation to the developer, you will unlock additional tools, like integrated ICC profiling - the developer has integrated ArgyllCMS profiling into RPP. It is really a snap to develop ICC profiles with a GMC Color Checker. The unlocked version comes with some film profiles as well, emulating the tone curves of some classic color and black and white films.
Download it and give it a shot. See what you get in terms of image control and quality - i think you will be impressed. I am still exploring the various output options and such, but take a few minutes to read the user manual and the developer's website and get an idea of his design philosophy and motivations for the application.
Kirk
Screenshot:

In the screenshot I have CTRL-clicked on the gray target, just below the crosshairs to select this point for color data in the histogram. The gray line in the histogram shows me I am in Zone V, with the orange numbers at the border of each zone showing me how much exposure compensation I need to move the selected point to that zone.