If you ever wished to have those neat Unicode characters (like these ⌘ ⇧) in a matter of a few seconds without having to previously save them in a text file, then MacKeys’ website is aimed at you. Created by Mathias Bynens, there are basically to text input fields, you write something like command + option + 5 in the top one and boom, here’s the Unicode version in the bottom one.
Also, you can press the keys on the CSS3-powered keyboard at the end of the page. Oh, and don’t forget that there’s the iPhone version of the website too.
Bookmarked.