As for the "Save for Web" function in PS, I don't believe it resizes the image. It does warn you if your image size is considered too large for web viewing. It states that you may have memory problems if you continue. It also gives you the option to include the ICC profile embedded in the image, convert to sRGB on the fly, and also the ability to optimize the image for web use. Not being very versed it GIMP I am not sure if all these features are available in the standard save dialog. Just wanted to point these out.
My experience with Digikam has been kind of a love/hate experience. I think it has great potential as being a one-stop shop package but the workflow is a little disorienting/confusing but the biggest reason I no longer use it is it seems to have issues with correct color rendering. Even if I turn on the color management it still does not show colors correctly. I would love to figure out what the problem is because I think it is a decent program. I have read other posts from people who have mentioned the color issues with Digikam but no solutions are mentioned. Can anyone help?
Hey what about adding xicc in the Color Management section. This lets you set the ICC Color profile for the X display. The way I understand it, it allows you to load a profile for system-wide use to color manage apps like Gimp, Krita, Eye of Gnome, Gnome Viewer, Ufraw, Inkscape, etc. With a small script it can run at startup. Just thought I would mention it.
Great resource! I hope it continues to get updated. Linux is gradually evolving and this is great info for us photographers. Thanks!