Standalone Web Inspector.app
This is a really simple app for Mac OS X that wraps the very latest WebKit Web Inspector and simplifies remote debugging.
How to install
git clone 'git://github.com/subtleGradient/StandaloneWebInspector.app.git' $HOME/Applications/StandaloneWebInspector.app open $HOME/Applications/StandaloneWebInspector.app
If you choose to download a zip instead...
You'll need to rename
StandaloneWebInspector.app or else Mac OS X won't know how to launch it.