What are best firebug equivalents for other browsers?

Question

I sometimes need to debug JS in other browsers, and it would be really nice if they all had Firebug - failing that, what's the closest they have?

Answer 1

Firebug Lite

Answer 2

IE8 - Developer Tools (F12)
IE6,7,8 - Visual Studio/Microsoft Script Debugger/DynaTrace (for tracing JS, not debugging)
Chrome, Safari - Developer Tools.