An AOA guage is an option on the A320.
I used to instruct on a military aircraft with an AOA indicator, and the apporach AOA inditaor which woked with the gear down as Jabarra describes. It's a very useful gadget and those of us who flew the Tucano found we used it a lot. We had a problem with the ASIs failing due to disturbed airflow over the staic vents while spinning invered. It happened to me twice. The official way of getting it back on the ground in this situation was to fly a formation approach and landing, but the second time it happened to me I flew an approach using the AOA guage which worked fine.
Interestingly, Air data Recorders record AOA and accident investigators always comment on AOA in handling incidents. But not many people think it's important for the pilots to know!