HLExtract is a command line utility written in C that can load all HLLib
supported packages and extract multiple items from them while maintaining
their directory structure.  Currently, BSP, GCF, NCF, PAK, SGA, VPK, WAD,
XZP, and ZIP (store/deflate) package formats are supported.

WWW: http://nemesis.thewavelength.net/index.php?p=35
