Fico's version is "Fico Score Simulator". 

One can run simulations on withdrawal rates and asset allocations.

If they claim their favorite hobby is staying home playing flight simulator in the take off mode but not landing mode, run.

@James Peterson has the best answer here especially in this part ""but in the long term, your rate of return will be much less than here in California".I actually did a simulation comparing this two outcome, so hypothetically if you have half a million and invest at one MF in CA and 10 Midwest SFR with 1.4 rent value, the IRR and total 5-year return could be the same because the rate of appreciation in many cities is still 7-10% whereas midwest is 2-4%.However, the actual probability of achieving these numbers in reality, within CA the number is actually much achievable because the appreciation and job growth in CA is more deterministic.What I found is if you can find MF in CA that has cap rate at least 7% and you can rehab it, you're doing good in terms of appreciation and cash flows.

You can do simulations to see what moves will help or hurt your credit score.

They have an Income Statement, a Tax Package (probably either of these would be what your accountant needs), and even a stress-test that will simulate your performance in a market downturn.

There are programs available to lenders like myself that are able to run a credit simulator. 

As a lender, if one of my buyers has a score less that what the loan program allows, I run a report called the "What If Simulator".

You won't be able to find it if you wait too long then you have to simulate the actual issue which can be tough.

Yes, the Monti Carlo simulations can be used for many situations -- the statistical math model is pretty sound.