Keep all of your cleaning supplies in an easily accessable space with Thomasville Cabinetry's Utility Cabinet. I think this idea could be easily modified on a standard kitchen cabinet with a little ingenuity.
20+ DIY Corner Shelves to Beautify Your Awkward Corner
Great use of dead space with hidden sponge cabinet located below kitchen sink. Hidden pull-out panel below kitchen sink housing kitchen sponges and accessories. my parents did this in their house-such a great idea