I carry a Leatherman Rebar when I know I'll need a few more tools in my pocket. It's only a few times a month but when I do it's indispensable.
The size is both small enough to fit comfortably in my pocket while be substantial enough to feel like a real tool. The tools I use the most are the pliers, Philips screw driver, and wire cutters.
This model locks the tools while they are open which I prefer but it lacks scissors, a replaceable bit driver and has, in my opinion, a light duty knife.
I always carry at least one good knife too. I've been pleased with the Knifeless Rebar as a companion tool.
My main multitool these days is a Leatherman Free P4, but I replaced both blades with other third-party tools (from ZapWizard).
What is the quality of the 3rd party tools like? I’d be interested in the scalpel holder and the bit holder. I don’t need the Free P4 saw ever so replacing it would be just fine.
The tools are 3D printed in metal. The designs are excellent and the tools work quite well. I've been using them for at least six months and haven't had any problems.
I got the bit holder, the T-Shank saw blade holder, and the scalpel holder. They more than make up for what they replaced, except for the blades. Since I always carry both a plain edge and a serrated blade, it's all a trade up.
ZapWizard was also very helpful.