Slackware latest stable version is 8.0 at the moment of writting this, which include XFree86 4.1.0, Linux kernels? 2.2.19 and 2.4.5, KDE 2.1.2, GNOME 1.4, glibc? 2.2.3, and all the usual utilities. Additions include ProFTPD?, OpenSSH and OpenSSL?, [mod ssl]? and [mod php]?, full support for the 2.4 kernel series, and many more.
There is also a -current version that can be used if you like [bleeding edge]?.
For more information and downloads visit the Slackware official website at http://www.slackware.com/