I've been using the TB Strobe tuner. It is a stand alone app but it behaves like an old fashioned strobe tuner and will show the harmonics as well as the fundamental.
I got it for $5.00 and i really like it.
It would be nice to have inside the daw so I could check the samples or soft synth to make sure everything is on pitch.
It's not a deal breaker but sure would be nice to have a good tuner built in.