Linked from
The 18 pages that link to Ostwald ripening, each with the reason it gives.
EmulsionRelated: It changes emulsion droplet sizes even when droplets do not collide.
CrystallizationRelated: It changes crystal size distributions after initial crystallization.
EmulsifierRelated: An interfacial film may not stop this separate route to droplet-size change.
FoamRelated: Gas transfer between bubbles can coarsen foam even without bubbles touching.