I too have been wondering about a universal remote app for the One. I'm surprised there hasn't been more discussion about this on XDA. (There probably has, I don't check terribly often.)
Anyway, I found this
but it doesn't look very promising.
Here's another one
I'd be willing to try, although the UI could probably use some work in my opinion.
I agree, they need to have trial versions so I don't have to spend money for something that doesn't work. Or maybe ad-supported versions. As IR blasters become more common in devices, the more choices we will see.
Perhaps I might begin work on an app, although it will probably be a major pain in the @$$. Luckily I know some people who will be willing to help.
"Any fool can criticize, condemn and complain - and most fools do." - Benjamin Franklin
Hit thanks if I helped you!