Minimum RAM requirements: 4MB
Ranked in these QuestionsQuestion Ranking
Pro Very customizable
SliTaz is very customizable. You can programatically edit and change anything you want on how the OS looks or behaves.
Pro Can run inside a floppy disk
Tiny SliTaz is even smaller than SliTaz and it's built for systems with true minimal requirements. With a size of just 4MB it can fit in a floppy disk.
Con Install instructions are in French
When first booting SliTaz from a USB or from a Live CD, the installation instructions are in French.