The Sprint HTC EVO 4G LTE is nearly devoid of bloatware. It's got the Sprint Zone and HTC Hub apps, but it's missing all of the usual carrier-loaded crap we're used to finding littered in our app drawers. It's also missing a few staples, though, including the Flashlight application. Getting it back is pretty simple, as SuicydeStealth points out in our forums. (As did EeJLP, apparently.) Just fire up the HTC Hub app, go to HTC Essentials in the categories, and there you'll find the flashlight app. And while you're there, might as well poke around and see if anything else is missing.
Interesting is that this isn't even an option on the AT&T HTC One X. Flashlight just doesn't show up.
More: HTC EVO 4G LTE forums