As the head branch of Ghostscript is now under GPL (and not only the previous major version as formerly) the ESP Ghostscript project is discontinued and the extra functionality of ESP Ghostscript is merged into the head development of Ghostscript, GPL Ghostscript.
Changes applied to GPL Ghostscript are:
Enhanced PCL XL driver: Duplex and tray selection support
Shared library and driver (X11) support for Linux/UNIX: Now distributions can have one binary Ghostscript package for both server and desktop
The “cups” output device that generates a series of raster images for CUPS printer drivers.
Nearly all known free printer drivers which have to be compiled into Ghostscript - drivers listed with “Execution style: Ghostscript” in the OpenPrinting database. Not included are some obsolete drivers such as hpdj which is replaced by the included pcl3 driver.
All known Uniprint configuration files (*.upp) as listed on OpenPrinting database
Patches to add the NOMEDIAATTRS option to Ghostscript, which allows CUPS drivers to use media options separate from Ghostscript
KRGB support for IJS drivers (not yet completed)
OpenPrinting Vector interface
Support files for CUPS
Enhanced build system
All sources and distribution-independent binary packages (for LSB-3.1-compliant Linux distributions on 32-bit and 64-bit PC platforms) are available.
More information and download