[stinos]

well I'm using Notepad++ atm and it's fast as well. It also has the awesome feature (Opera also has it) that you can close tabs by doubleclicking them. Once you get used to that it's extremely hard to not use it everywhere..

[mobweb]

OS X has CMD+W which also can be used almost everywhere, including Sublime Text, to close a tab.

[stinos]

yes I know. Practically everything under Windows uses Ctrl+W as well for closing tabs/windows.