Bar end shifters.
I really tried to like these. I even did several rides with them. Each time when I decided to shift I would invariably have to slow down or crash. This was on a closed flat smooth bike path with the levers shifting flawlessly in the work stand. I realize I just need more practice with them, but don't want to pay the price of experience in scars.
On the campy two bolt seat post, park tool made a wrench for this that has a different angle than the campy wrench. It works much better, but not as good as the rachets.