When it comes to hardware, there is plenty of stuff to consisted: drawers, pull-outs, organizers; metal or wood; colors;
Garbage recycling center is a must (even if you are not recycling - just to put garbage there). Ideally German, as it works more smoothly than those from China and overall look better. Garbage bins (2 to 5) can be 30-to-90 liters in total, and it could be pretty heavy, therefore it's better to have a more sturdy hardware.
Spice racks can me made of maple, birch plywood, or metal. They are available in many different sizes from 3" to 20" wide (maybe more - a custom spice rack can be any size), There are options for both lower and upper cabinets.
Drawers these days are all soft-close but there are different levels of hardware. Basic or more advanced (with push-to-open option) which works more quietly and can withhold loads up to 80 kilograms. There are many materials available. Depending on the style of your kitchen, you can choose solid wood dovetail drawers, chrome or painted metal, glass, and some other options. Servo-drive is also a nice feature. Metal drawers are only available in certain heights whereas dovetail are custom made and can be any size.
Pull-outs are available in different heights and widths and mostly used in pantry cabinets. Imagine how hard it would be to reach stuff at the back of your 24" deep pantry. Pull-outs can definitely solve this problem - you just pull it out and have access to the entire pantry. The drawback, however, they could be pretty costly: $500-$2000 each.
Walk-in Closets is not exactly an accessory, but a true enhancement that can help add some much needed space to a kitchen pantry. When you add a luxury walk in closet to your kitchen it can transform your space into something truly unique and special