IE7 by Dean Edward is such a cool hack: a bunch of JavaScript files that enable good old Internet Explorer for Windows to actually do CSS2, transparent PNG and other modern web techniques that standards-savvy web designers are begging Microsoft for for years now.

All you have to do is to include a single .js file in the header of each HTML file you want to enable it in and you‘re done. There is even an IE Favelet you use IE to „update“ standards-compliance on the fly for any web page you are just looking at. Amazing.