Not the most interesting of kitchen gadgets, but necessary: a salad spinner and a number of colanders.
I remember my late father-in-law laughing at us when we said we wanted a salad spinner. He hushed pretty quickly when my husband (his son) demonstrated the wonders of washed homegrown salad leaves spinning off excess water, enabling you to make soggy-free sandwiches. This particular Salad Spinner was a little on the pricey side, but I managed to get mine in a sale. I like it for two reasons, its one handed spinning operation - you press down on the black rubber knob and it spins effortlessly and secondly, its non slip. My only qualm about it, smaller salad leaves sometimes gets stuck in the basket, so you have to work a little to clean it. Otherwise, its been an excellent buy, I've had it now for over 8 years I think.
I also have a variety of sized colanders, or are they called strainers.
Indispensable in the kitchen for draining cooked potatoes, pasta, rice, beans - oh lots of things. The smallest one on top is often used for draining canned chick peas and making chickpea hummus.
I also have a very post colander hand-made from pottery. Its designed specifically for strawberries, but I've decided to share that with you some time in the future.