Here's a few projects I've worked on that are designed for and using Puppy Linux, which is a great, free and totally customisable linux desktop distro.
Puppy Arcade is a live CD that has been specially built for retro gaming, and features a collection of emulators for popular gaming consoles and arcade machines.
Puppeee Arcade is a linux distro for Eee PCs, that aims to be a general desktop OS, suitable for all Eee PC users. It's fast, feature-packed and should meet most users needs.
Firedog is an all-in-one browser solution that features super-fast
browsing, FTP client, IRC cient, a built in email client, and a huge
number of addons and tools.