They all seem to be variations of what are commonly called here as "ivy geraniums", which are used most often in hanging baskets or window boxes. Their natural form of growth is not upright like standard zonal geraniums but very lax and cascading. And they flower very heavily, IME. I've grown several different kinds, including the 'Acapulco' listed in the link below.

Here is a link that might be useful: cascading or 'alpine' geraniums