Kitchen design apps??

Ok trying to remember all questions, cos you chatterboxes flipped pages.

Curved cupboards - yes readily available, if not a radius post is a cheaper alternative, 50-80mm round post on the end really softens the worktop.
Wellie cupboard - not a problem, bench-style seat top, wood would work well. You need it to be around 530mm height to allow wellies to sit inside upright, 530mm is a little higher than a normal seat height but a lot easier to put a welly on from.
Worktops - one of the best tops for pastry is a plastic, minerva, maia, durosein all are acrylic, so cold and smooth and about a third of the cost of stone. They are plastic though so not as environmentally friendly, and not great against an aga.
Minerva does some called Travertine haze, or concrete haze, or silver haze. They all look like limestone with different base colours.
You could go stone on the aga length and change to a different top elsewhere if you need to reduce costs. Finding someone that sells Second Nature kitchens nearby would be useful as they do a range of quartz worktops called strata super 8 which are 20 and 30mm thick and available as a small selection of 8 colours but, are very competitively priced. Second Nature, also known as PWS price for the slab and not the machining, so a single slab is 2900 x 1300, then cutouts, polished edges, templating and fitting are all included. They don't deal directly with the customer unfortunately but through kitchen retailers, they are still however excellent value.
Can't remember what else you mentioned!!