To provide a more mechanical answer to your question, any firearm design that separates the potential energy source (mainspring/hammer or striker) from the primer whenever there is not a deliberate action to pull the trigger ought to be safe from an inertia discharge. Commonly, this is called being "drop safe", but the same factors that can set off a dropped gun can also come into play if the gun is physically bumped from behind, say, during a disarm/retention attempt, or if something strikes the back of the gun while it is in the holster. A blow to the front (muzzle) end can also cause an inertia discharge, and I believe the CA drop test has the gun land muzzle first.
So, inertia discharges are potential issues even when one does not lose control of the gun by dropping it. I'll give you that...
So, what's inertia-"proof" (again, noting that no mechanical system is 100% reliable)? Any gun with a correctly designed firing pin block (like SIGs, Series 80 1911-pattern pistols, &c.) or a striker block (Glocks, M&Ps, &c.). You'll see this feature advertised when available, because of course every manufacturer wants his gun to be lawyer proof. The SIG classic P series guns were among the first of the modern service pistols to be designed inertia-safe from the ground up, if I recall correctly, though they are far from the only ones.
I believe one of the Ruger recalls (somebody back me up on this---SR9 or LCP, I think) was due to a potential inertia discharge issue, so just because a gun is of recent design does not guarantee it is drop safe.
What is not drop safe? Shotguns, most rifles/carbines, and older revolvers all connect the hammer through the firing pin to the chamber, so they can have inertia discharges. This is why most folks advocate keeping defensive rifles and shotguns loaded but with an empty chamber. Somebody else will have to chime in about any striker-fired guns with inertia discharge issues, because I am just not that into that type of gun.
Did you have particular models you were curious about?