Grapher is such a handy tool. Unfortunately, it hasn't received any updates since its introduction. There are a couple bugs, e.g. when right clicking on an equation in the sidebar, the context menu does not appear properly.
I can't believe that Apple doesn't advertise this more. It is rather powerful http://i.imgur.com/3LN7o.png and extremely easy to use. It is especially useful for introductory college-level Math given its 3d graphing capabilities (calc 3) and ability to plot slope fields (diff-eq).
Tip: Round the x and y values of grid lines to the nearest pixel so that you don't have the effect where most of them are drawn over two rows/columns of pixels. It makes it look much sharper.
With the reason "Abuse and Copyright Infringement" no less. If you attempt to re-register the domain, it will either be unavailable or become a premium domain for which you need to pay.
Yep. I even have a few free 4-letter domains from it, which is rather rare nowadays for any TLD (though probably not too valuable here, especially since you can't really do "-tk" domain hacks).
del.icio.us was a "domain hack". He's talking about the fact it is hard to construct one with a .tk domain as there are so few English words that end with tk (if any?).
This is actually a browser issue. AFAIK, Chrome and Firefox both round subpixels (e.g. 1.6px -> 2px). If you try doing the same thing in Safari you will notice that the graph looks as smooth as butter.
http://i.imgur.com/ql0Y23a.png
Having shared that, this is a really cool thing for the web.