Pitch (including auto, manual, and T-Pain-esque capabilities).As such it's got 11 'sub-effects', all of which can be individually disabled and some rearrange-able to suit your needs. It's basically a 'vocal processor in a box' style plug-in. Some of the more specific ones are good, but a lot are way too much.
(Probably bass and other monophonic instruments to start.) It has a lot of genre focused presets, of which, the generic styles are pretty much greatness. Nectar is a 'vocally focused' processor, although I intend on testing it with other instruments. The CD that I'm currently doing is for a comedian / parody artist, and as such, covers many different genres, styles, and decades. I downloaded the demo for Nectar, and started putting it through it's paces. I was needing some better pitch correction than Logic's built in version, and a decent de-esser. I'm an actual producer mid-way through a CD.