Parts of Simplux
Kernel

Simplux is based upon the Linux kernel maintained
by Linus Torvalds and lots of other kernel developers.

Simplux also uses additonal kernel modules, namely

* squashfs by Phillip Lougher
* aufs by Junjiro Okajima

Automatic Hardware Recognition and Initialization

Hardware recognition is based upon scripts taken from Puppy Linux, mostly written by Barry Kauler.
Session Management

Session management scripts are genuine Simplux, written in Simplicity by Michael Niederle.
Package Management

Simplux uses Portage originally developed for Gentoo Linux as its primary package manager.

A lot of thanks go to Günther Brunthaler who helped integrating Portage into Simplux.
Desktop Environment

The primary desktop manager is iceWM by Marko Macek. Simplux adds automatic menu generation for "emerged" packages.

http://simplux.org/
http://www.murga-linux.com/puppy/viewtopic.php?t=25854