Anything that isn't symmetrical. Mice and keyboards. Circular saws. Tape measures. Box cutters. Folding knives. Garden tools. Those are just ones that impacted me recently.

Some have lefty versions but there is less selection. I recently found a left-handed weeding sickle and it is the best thing. Most of them are just annoying. I can do most things with right hand but then have to switch hands instead of the natural motion. But there are a few that are dangerous.