John ...
I'm not sure what types of applications
you're looking for, but I have some JavaScript plots
that might be interesting to test ...
http://fastq.com/~sckitching/JS/Circle_MH.htm
http://fastq.com/~sckitching/JS/DD_Circles.htm
http://fastq.com/~sckitching/JS/Parabola.htm
--
Cousin Stanley
Human Being
Phoenix, Arizona