exiv2 : EXIF, IPTC and XMP metadata C++ library and command line utility ( https://exiv2.org/ )
geeqie : A lightweight GTK image viewer forked from GQview ( http://www.geeqie.org )
msdfgen : Multi-channel signed distance field generator ( https://github.com/Chlumsky/msdfgen )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a d-e-s-o
For Paludis use this rsync : rsync://gentoo.zugaina.org/d-e-s-o-portage
If you have a problem : ycarus(-at-)zugaina.org