VistaSwitcher is a beautiful Alt-Tab replacement

VistaSwitcher is a beautiful Alt-Tab replacement. It's aimed mainly at Windows Vista and 7, but it also works under Windows XP.You get a huge thumbnail of the destination window; it's far larger than the one that comes with the "stock" Alt-Tab. Another neat feature lets you Alt-Tab between the windows of just one application. It's kind of like pressing Win+[number] in Windows 7, but you don't