I just rewrote my SVG grapher sans conics so that it doesn't suck.
Polar graphing is usable, and you can change the window settings around now. I also added support for parametric equations.
I haven't gotten around to adding conics back yet, but I promise they'll be back and better than ever.
Of course, you'll need an SVG enabled build of Mozilla to view this.
Windows users, you should get a GDI+ build (this is off the 1.3 trunk):
Other OS's, you hunt around for a libart build at Mozilla.org.
Here is it:
For the underprivileged surfers who aren't using Mozilla (or don't have an SVG-enabled build), you can look at a screenshot here:
Other than adding conics, I need to allow the user to redraw graphs on resize (zoom out after graphing to see why), selectively clear certain graphs, and probably implement a degrees mode.
A XUL Sidebar version is next on my list after these, followed by an IE port using the Adobe SVG Viewer.
What are your thoughts?