I've been working with Scala quite a bit lately, and in an effort to get it all to stick in my brain, I've created a Scala cheat sheet in PDF format, which you can download below.
This PDF is very different from my earlier Scala cheat sheet in HTML format, as I tried to create something that works much better in a print format. (I first tried to get it all in one page, but short of using a one-point font, that wasn't going to happen.)
Here's the download link for my Scala cheat sheet file:
I've only been using Scala for a little while, so if you can recommend anything to add, or find any errors, please let me know.