The Brainworx BX_Tuner from Plugin Alliance is no latency, easy to use, and light on the CPU.
It has some pretty cool features, like being able to DIM or MUTE the output. It’s a very stable tuner that doesn’t fly all over the place which can make tuning difficult.
One thing I would like to see improved would be to have an option to switch the display to sharps (#) as the only option is to display flats (b). It’s not a big deal, but worth mentioning so you are aware before you make the purchase.
Overall, it’s a great guitar and bass tuner plugin that is accurate, no latency, and inexpensive.