After playing with Quantrix today and reading the comments here, I tried out Citrin (Aabel's demo isn't downloadable). There's a definite difference in feel between the two; Quantrix emphasizes direct manipulation of the metadata (axes/dimensions), whereas Citrin allows direct manipulation of the visible data, yet when you move into metadata, it shifts to buttons and switches everywher. For example, you can drag axes or items in a chart legend to reorder them in Quantrix, versus picking from lists in an inspector in Citrin. It looks like Aabel is much the same; take a look at this video for example:

http://www.gigawiz.com/movie3r.html

While it's admirably usable for a Java app, I wish Quantrix would adopt a few useful Mac OS X behaviors—the behavior of its pseudo-inspector ("Format Toolbox") is confusing, and the inability to copy/paste styles—or define templates at a granularity smaller than a document ("model")—are annoying when you want to analyze different instances of data in the same way.