Erm, do you understand what an index is? Technology indices all do that, and you really missed the point of Howard's question. Financial indices do the same, but with financial stocks, for example.
Have a look at the ones I've mentioned, that should give you a reasonable start.
But some indexes are comprised of fewer companies than others, some are focused on green technology some are focused on up-and-coming technology etc etc. These all seemed a little too specific for me.