butteraugli : A tool for measuring perceived differences between images ( https://github.com/google/butteraugli )
colorpick : Color picker and contrast checker ( https://github.com/agateau/colorpick )
depix : A tool for recovering passwords from pixelized screenshots ( https://github.com/beurtschipper/Depix )
dssim : Image similarity comparison simulating human perception ( https://github.com/kornelski/dssim )
guetzli : Perceptual JPEG encoder ( https://github.com/google/guetzli )
lsix : Image viewer for terminal that use sixel graphics ( https://github.com/hackerb9/lsix )
pineapple-pictures : A homebrew lightweight image viewer ( https://github.com/BLumia/pineapple-pictures )
pingo-bin : Fast web image optimizer ( https://css-ig.net/pingo )
qView : Practical and minimal image viewer ( https://interversehq.com/qview/ https://github.com/jurplel/qView )
screencloud : Screenshot capturing and sharing tool over various services ( https://screencloud.net )
xgrabcolor : Qt-based basic color picker ( http://hugo.pereira.free.fr/software/index.php )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a nest
For Paludis use this rsync : rsync://gentoo.zugaina.org/nest-portage
If you have a problem : ycarus(-at-)zugaina.org