Alloy Apparel is good for pants, but I've haven't liked any shirt I got from them. Banana Republic and Gap offer tall sizes and their pants and tops are generally good.
Other than that, sleeveless (or 3/4) tops, shorts and skirts don't really discriminate against tall people, unless you get short torso shirts, which happens.
Weirdly enough I have found it a lot easier to find female clothes that fit than I ever did male.