Hullo,

have a look at Superpolator2, my new Mac OSX app specifically for interpolations. As many dimensions as Doctor Who, but without the MultipleMaster straightjacket. Partial masters. Glyph specific axes, manage dozens of masters, generate hundreds of fonts. Explore design spaces, pick promising extrapolations. So you have time left to look at the original designs again. Some animations here. And pretty colors.

Based on the Superpolator math presented at ATypI in 2004, RoboFab and many other great libraries..