If you are doing websites, you might want to test them with Safari as well.

Sure, konqueror and midori (which uses GTK webkit) already provide a pretty good approximation on Safari rendering, but there might still be differences.

Here's how to run Safari on Linux:

• run winecfg, set Windows version to WinXP.
• copy the core windows fonts:

  cp /usr/share/fonts/truetype/msttcorefonts/{Arial,Times_New_Roman}*.ttf ~/.wine/drive_c/windows/fonts/
  

• Download Safari for Windows from the Apple homepage
• Run the Safari installer with Wine. Do not install Bonjour or the Apple updater.
• Run Safari

The biggest 'trick' for me was to install the Microsoft fonts. Without them, Safari would segfault when rendering the URL bar the first time.

Step 2 assumes you have the Microsoft fonts already installed on your system in the place typical for Debian and Ubuntu users. If you don't find out how to get the required ttf files yourself. You maybe also can just symlink them.

Wine can indeed run most Windows applications by now...

P.S. ies4linux claims to have a way of installing and running MS IE 7 on Linux. I didn't test this. But that would give you the full array of major browsers on Linux: IE6, IE7, Safari, Iceweasel (Firefox), Opera. And tons of more usable and better integrated browsers such as Epiphany. :-)