Here's an article about Slackware, which people refer to Un-Buntu or anti-buntu. It's not a flame war, but a small review about Slackware, compared to Ubuntu, regarding the packages. Slackware has about 800 packages, compared to 12000 packages in Ubuntu (derived from Debian), but most of us don't use that much. We mostly use only about 20 application in our daily activities.
Slackware also lacks from official repositories, like ini Ubuntu, but community can help you by making packages for you. Check LinuxPackages, Slacky.EU and SlackBuild for more Slackware packages.