(Melting ice.)
Other types of necessities (in conjunction with putting frozen liquids and warm areas): child, oneg Shabbos, etc.
The Part of the Melacha That Is מדרבנן (m'drabanan);
Putting Clothing into the Washing Machine Without Any Water;
(Squeezing materials.) many different problems that arise with a spill on a tablecloth that has no plastic cover;