What software is good for analysing deal's?
Deal analysis tools are a dime a dozen, you can use spreadsheets, web apps, native mobile apps, etc, it all depends on your preference.
There are a bunch of Excel spreadsheet templates in the BP fileplace for analyzing rental deals or rehabs.
Here's a few:
Otherwise, BP has their own Calculators you can use to analyze rentals or flips.
What type of deals are you trying to analyze?
@David Robertson Brrr and Fix & Flip deals.