If you are lucky enough, you could buy a HUD home through the Good Neighbor Next Door program. The reason I say lucky, is it is a lottery. From there , there is CHFA, CHAC, HOAP, the Metro Mortgage Assistance, and most of all make sure if you are an eligible first time buyer, that you ask for the Mortgage Credit Certificate. This is a tax credit that few know about, and many lenders can't offer you.
Best of luck
Summit Mortgage Denver