There is no other stack (that I know of) that can do this specific thing: take invisible content and make it appear when relevant keywords are typed in.
Foundry looks tempting but I just can’t take that plunge right now. (as in, I can’t spent $160ish right)
It finds content from whole site and displays in pop up.
Like a search machine for your home page but without the need of using databased indexing or using googles external search.