What cleaning products do you consider a necessity?

If theres a buck to be made some company will come up with a product for every little thing. But Im sure no one really needs separate cleaning products for tile floors,bathtub,toilet,windows,walls,shower doors,car interior,stainless steel fridge,etc etc.

Now obviously we arent gonna clean fine wood furniture with ammonia or porous tile with vinegar I dont think,but we do want to pare down the mountain of cleaning products we have

What are your must-haves dues??

What do ya find works the best.. Natural stuff or stuff loaded with horrible chemicals??