Field looks interesting but I'm a bit skeptical about its usability after downloading it and poking around for a few minutes. One thing that seems incontestable is that the GUI is in need of a serious redesign to make it usable. I have 20/20 vision and the lack of contrast renders text very difficult to read. This problem seems to exist throughout the application (and on the website btw).
I've been working on something similar for about the same amount of years.
Would love to hear from people interested in these types of application(I'm not ready for a public release yet, but will begin putting up a bunch of Writeups/Demos soon):
Based on a quick run-through of the site, this looks absolutely amazing. I've been following Processing and openFrameworks for a bit, and this looks far more intuitive and mature.
