Drogue Chutes
Many aircraft, B-47, B-52, and F-4 come to mind, had no extensive problems with uncommanded deployment but they had specific reasons for having them installed. For the F-4, with the introduction of fatter tires than required for carrier ops, the reason diminished, but the chute was still there and I was glad to have it on a wet, mid-length runway one night.
Tactical aircraft, where their normal employment requires flight near the boundaries of control effectiveness, are fitted with spin-chutes for tests near those boundaries, but there is no justification for that kind of testing in transport category aircraft.
Spin-chutes didn't always work as desired. A colleague of mine took an F-4 out for stall investigations and got into a spin. He deployed the spin chute but it came off completely and did no good. They had to punch out.
As someone here, or in another thread, pointed out, you don't fly transport aircraft near the edges of the maneuverability envelope. Teaching the pilots how to recognize how far the airplane can be flown before they get into some kind of controlability problem should be enough. This seems to be an area that may not have been given enough emphasis in training, given the circumstances of AF447.