Can we extract the contents of a *.vpk file?

[Nyarlathotep]

I want to extract the maps for the zones beyond Antonica/Commonlands. There are DDS map files for all the areas around Antonica/Commonlands, but I cannot find the maps for zones like Nektulos, Thundering Steppes, Enchanted Lands, etc. I suspect that these maps DDS files are in the .vpk files for the zones.

Has anyone developed a *.vpk extraction/viewer tool?

Is anyone planning on making one?

Thanks in advance!