XFree86 is a added-value pack for X11R6 that supports several versions
of Intel-based Unix and Unix-like operating systems.  XFree86-3.0 was
part of the X11R6 core distribution.  This release of XFree86-3.3
consists of many new features and performance improvements as well as
many bug fixes.  The release is available as source patches against
the X Consortium X11R6 code, as well as binary distributions for many
architectures.

WWW: http://www.xfree86.org/