Sprintech bar-end mirror, one on the left side of each drop bar road bike. One bike has the "right" mirror on the left side but the reversed comma shape doesn't hinder it.
And Take-A-Look mirrors on two main helmets. No mirror on my aero helmet, although I still rely on the bar end mirrors for those occasions.
Mirrycle on one hybrid. Nothing on the other hybrid because it uses bar end shifters and I haven't decided on a handlebar mirror I want for that bike.