Geeqie can display files for which there are existing pixbuf loaders. In addition to the standard ones included with most distributions, the following loaders may also be available to you.
However, in some cases you are required to compile and install them yourself.
svg
librsvg2-common
wmf
libwmf0.2-7-gtk
webp
https://github.com/aruiz/webp-pixbuf-loader
Example installation script:
sudo apt-get install libglib2.0-dev libgdk-pixbuf2.0-dev libwebp-dev
wget https://github.com/aruiz/webp-pixbuf-loader/archive/master.zip
unzip master.zip
cd webp-pixbuf-loader-master
./waf configure
./waf build
sudo ./waf install
xcf
https://gitorious.org/xcf-pixbuf-loader/mainline?p=xcf-pixbuf-loader:mainline.git;a=summary
psd
https://cgit.sukimashita.com/gdk-pixbuf-psd.git/
JP2/JPC/JPX/J2K/JPF
If your distribution has the libpixbufloader-jasper.so loader, these file formats will also be displayed.