HostGIS Linux is a Slackware based Linux distribution. HostGIS Linux comes with several open source based GIS tools installed. For the less technically inclined compilation/installation of tools like UMN Mapserver might take a lot of time.
Some of the tools/packages installed are:
The usual amenities of Slackware Linux: compilers, Perl, etc.
Apache HTTP Server, with PHP
MapServer, and MapScript for PHP, Perl, and Python
PDFlib, with support built in to PHP, Perl, Python, and MapServer
PostGIS-enabled PostgreSQL database server
MySQL Server
Webmin, phpMyAdmin, and phpPgAdmin for easy system administration
Example maps and map frameworks already installed, demonstrating MapServer Web Widgets, Map-Fu, ECW images as data sources, PostGIS, MyGIS, WMS server and client, Flash output, OpenLayers, TileCache, and more.