With Filestar you get 167 different skills for working productively with GIMP Image .(xcf) files.
About .Xcf
Name
GIMP Image
Extension
.xcf
Format
Binary
Category
Raster Image
Developer
GIMP
Description
Image file created by the GNU Image Manipulation Program (GIMP), a freely distributed image editing program; saves layers, channels, paths, guides, and the current selection when saved.