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Full user review
"Most efficient way to find the character you want!"
Ease of use, fast access, easily personalized, unobtrusive, regularly updated.
None that I know of.
PopChar X is so much easier to use than trying to use Apple's character or keyboard viewer. It is, in my book, a 'Mac Essential.' I've had others, but PopChar X is the full-featured, well polished, champion of its class.