@Aspri - it is not that easy as you think... Most probably, your Android tablet is using Arm processor, and there is no standard way of putting another OS in the Arm world. So, you will not find Slitaz (or any other Linux) for your tablet, unless it is very popular, and someone has made a Linux image specifically for your tablet.
YOu have much better chances of finding alternative Android for your tablet, though. Check http://www.cyanogenmod.org/