Melodyne, ProChannel EQ, ProChannel 1176, Lexion Reverb, and EZMix, the last of which requires explanation (see below).
Although I do not like many of the presets, there are a few inside Toontrack's EZMix 2 that I use quite often. (I have EZMix 2 + Mastering + Vocal Toolbox).
In the drum department, I use the Firm Kick preset a lot. This alone would justify the price for me. A couple of the other kick presets are equally good depending on your style of music and the original drum sound. (I have also used tom presets to control the bottom and hi-hat presets to turn trashy into crisp.)
Bass with Limiter is excellent on DI'd or clean sampled bass. I use it on J Bass sometimes, but on a Rick, it really helps keep things under control.
There is a Compressor-Exciter vocal present that has helped me out a few times in getting the voice out front without making it sound too loud for the track. (Most of the vocal presets are a little too much for me, but my style is pretty organic.)
It doesn't come up often, but the Pedal Steel preset gives a good amped/club sound to a pedal steel sample.
I never use the guitar presents in EZMix, but that's just me.
So, even though I use only a handful for the presets, it is rare to have a track that doesn't use at least one. To my ears, there are a few good presets and a lot of "not for me" presets. As mentioned in the recent Sound on Sound review, this product would be WAY more useful if it were more tweakable, but then you'd lose the low price and simple interface that are the chief marketing points.
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