What can sometimes add confusion to interpreting this kind of thing is that some images will look "correct" while others will not, when compared in the same set of viewers or apps. Many times, if an application is not color managed (meaning it does not look for or interpret an embedded color profile tag) it will ASSUME that the RGB numbers in the file are meant to represent sRGB color values - if your file is indeed in sRGB (you converted it to sRGB in PS or some other application or step in your workflow) then it will appear "correct" in a non-color-managed environment that assumes sRGB; if your image is not in sRGB (say ProPhoto as an extreme example) then it will look wrong in non color-managed environments that assume sRGB, while it will look correct in color-managed environments like PS. Other times, the application will not assume sRGB, but will send the RGB numbers to the display directly - if your display is set with an sRGB or sRGB-like profile, then the sRGB numbers in the file will look "correct" - if the file is not sRGB, then it will not look correct. This inconsistency in how images are displayed has to do with the color numbers in the file - if they are meant for sRGB, they will appear consistent across apps that are displayed with an sRGB display, regardless of whether or not the app is color-managed; conversely, if the RGB numbers in your file are not sRGB, then the differences in how the image is displayed across apps can get inconsistently interpreted.
One way to infer whether an application is color-managed is to save an image in ProPhoto (open a raw file in your raw converter and convert it into ProPhoto and save) and then open it in several different applications - it will look terrible (desaturated, color shifted) in non color-managed applications that ignore the embedded ProPhoto tag (remember to embed the tag!) and it will look correct in color-managed applications that interpret the ProPhoto tag and display the colors and gamma correctly. In this exercise, you do not need to worry about saving it as a huge 16-bit TIFF, just save it as a JPEG - you are not going to be worrying about banding and all of that jazz that gives people fits when trying to save a ProPhoto file in an 8bit file format, you just want a throw-away test image encoded in ProPhoto RGB numbers that will show you the difference between non color-managed and color-managed viewing environments. You could use an AdobeRGB image too, it is just that the differences may not be as noticeable, especially if you use a larger gamut display and the application sends RGB numbers to the display in the display color space.
You can also save one JPEG with the "Embed Color Profile" check box enabled, and a second version without the check box enabled and see how including the tag for the ProPhoto color space changes how the file is rendered in each application.
All of this has nothing to do with calibrating and profiling your display, or whether your display matches your prints. This is just about whether or not color is displayed consistently across your workflow, independent of whether or not it is displayed accurately for your output device.
Kirk