I showed some of my bit drivers, but not my driver bits. This is my "travel case", I like to be able to take my bits with me if I'm going to be away from home for awhile.
I searched high and low for a 1/4" bit case that was compact and had holes for the most bits, and I found this one (came with a cheap set of Chinese bits. Most of my bits are Wiha). It has holes for 35 bits, but there's room for other things- like 19 Wiha micro bits (in the plastic tube containers), as well as a few mini 1/4" bit drivers, and a micro bit driver extension. All held securely in place without stuff getting rattled around.
The case is about the size of my wallet.
I guess this would be considered a "tool", it's a tire inflater. It's one of my favorite tools because I built it, it's unusual, and it sees regular use.
I had a Campbell Hausfeld tire inflator that ran on a rechargeable battery, and after about 13 years the battery finally gave out. Instead of replacing the battery I wanted a plug-in AC/DC inflator. So I pulled the pump and motor out, built a bracket for the pump/motor, wired it to an appropriate AC/DC converter for a 12v motor, and rubber-mounted it all inside a mini ammo can, with aftermarket toggle switch, 60 psi gauge, a different valve chuck, and a handle I liked better than the original collapsible one. I've been using it for about nine years now.
What I really like about the pump C/H used with this inflator is that it's all metal. You don't see that very often these days on little portable tire inflators (if at all). Campbell Hausfeld built these pumps to last.