Puppy Studio Lucid derivative developed by l0wt3ch especially for multimedia.
Originally called Ubuntu Studio: "Puppy Edition" created following the famous Ubuntu Studio Preparation guide.

Unmaintained, developer 10wt3ch has started a separate fork that isn't community developed. See Studio4

Puppy Studio download page
PuppyStudio3.3-rt.iso download

SneakyLinux youtube review
Whatever happened to Puppy Studio developer? thread