http://www.kvraudio.com/product/serum-by-xfer-records
Serum is a wavetable synth focused on hi-quality sound, and a sophisticated table designer/editor. I've spent a healthy amount of time on the interface as well, trying to make something a synth which is both intuitive and fun to program.
You can import audio (via a variety of analysis methods), draw (grid or freehand), use function formulas (for wavetable directly or FFT bins, for generating and/or processing).
While my next few days are going to be focused on getting everything ready for shipping, I'll try to pop in here and answer any questions!

