Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
The open source image editor known as GIMP doesn't need an introduction. Neither does its multi-window interface.
GIMP is a very powerful image editor, there's no denying that, but no matter how good it is feature-wise, some people simply don't like, or can't get used to the interface it sports.
With the new release of GIMP 2.7, that's not an issue anymore. GIMP 2.7 brings various improvements like in every new release, but one of the features that really stands out is the ability to choose the interface mode of your choice.