One of the cutest ever (leaf, flower, overall impression) is Saxifraga stolonifera.
I have to admit, it's in one of those spots, you know it's there, you don't tend to it too often, and once in a while you remember and just pass by to see what is going on.
I have to get out of the yard, out in the street, and peek through the fence bars if I want to take some pictures.
But it's thriving, despite the neglect.
Sun never shines there, I never water... but...