Here are a couple of reference sheets that can become handy if you're doing any semantic web-related work. I've found both of them online and will add more to this list as they come along.

I read from Bill Clementson's blog that AquaMacs Emacs 1.0 (is an Aqua-native build of the powerful Emacs text editor) has made its appearance during the last days - let's see how many new users it will conquer!!!