http://hyperpo.org/
I was testing the HyperPo text analysis with 3 John tonight and found they have a very nice feature. If you click on a word (excluding the small grammatical words - the, a, ...) takes you to the next occurrence of the word in the text. Much more user-friendly than a list of occurrences to click on. And yes, there are also a number of times when one really does need the list.