Linux Source Tools's repositories
gimp-plugin-vtf
VTF plugin for Gimp on Linux
file-roller-vpk
GNOME Archive Manager with Valve Pak(vpk) support
gdk-pixbuf-vtf
Valve Texture Format library for Linux/Gnome - This is a GdkPixbuf image loader, which lets you browse VTF files in Nautilus or open them with Eog, letting you export them.