Slax is a modern, portable, small and fast Linux operating system with a modular approach and outstanding design. SLAX is a LiveCD Linux distribution based on Debian (before version 9.2.1 which was released in 16 Nov, 2017 Slax used to be based on Slackware). Despite its small size, Slax provides a wide collection of pre-installed software for daily use, including a well organized graphical user interface and useful recovery tools for system administrators.
The modular approach gives you the ability to include any other software in Slax easily. If you're missing your favorite text editor, networking tool or game, simply download a module with the software and copy it to Slax, no need to install, no need to configure.
If you are a beginner or you're just too busy to make it yourself, follow a few steps to build your own customized operating system by using web-based interface here.