First, those are all Pelargoniums, not actual Geraniums (that is just their common name). And they can come with a very wide range of flower forms and colors with the rounded, balled heads typical of zonal or garden/windowbox geraniums being only one. Fancy leaf and scented geraniums often produce dainty little flowers singly or in small clusters

The dark maroon-purple one appears to be a form of Pelargonium peltatum, aka ivy leaf geranium.

And in suitably mild climates, these are fully perennial and often grow into small shrubs.

The dark one at the back is a Regal (Martha Washington) pelargonium.

Possibly. The leaves are not very clear in the photo and it blurs when enlarged.