Happy Sinks Magnetic Sponge Holder for Sinks, Black or Stainless Steel on Food52
The Lil Holster MINI - A Kitchen Sink Sponge Holder – Holster Brands
Amazon.com - Over The Sink Dish Drying Rack, Adjustable (33.8" to 41.5") Large Dish Drying Rack for Kitchen Counter with Multiple Baskets Utensil Sponge Holder Sink Caddy, 2 Tier Black