Build and link against GraphicsMagick instead of ImageMagick (might require USE=imagemagick if optional)
Name Category Description
cuneiform app-text An enterprise quality OCR engine by Cognitive Technologies
darktable media-gfx A virtual lighttable and darkroom for photographers
dvdauthor media-video Tools for generating DVD files to be played on standalone DVD players
fim media-gfx Fbi-IMproved is a framebuffer image viewer based on Fbi and inspired from Vim
gdl dev-lang GNU Data Language
gmic media-gfx GREYC's Magic Image Converter
octave sci-mathematics High-level interactive language for numerical computations
pdf2djvu app-text A tool to create DjVu files from PDF files
photoqt media-gfx Simple but powerful Qt-based image viewer
scribus app-office Desktop publishing (DTP) and layout program
vdr-text2skin media-plugins VDR text2skin PlugIn
xastir media-radio X Amateur Station Tracking and Information Reporting

Thank you!