Useful in a pinch, but I would not recommend using these. Make your own. If you plan on using the language, making your own cheat sheet is the best way to learn it. By the time you are able to make one, you know what you use, what you always forget, and what is obscure, but important enough to need a quick refresher.
What? Did you even look through at how comprehensive the list of APIs they have online here is? I'm a full-time developer . No way I'm going to waste my time making a cheat-sheet for functions I may only write a few calls to when I could be doing productive coding. There's just too many APIs I need to use.
For something I love and want to use all the time, like Python, I'll make my own cheat sheet. For something like MySql, where I have to kick myself to pay attention every thirty seconds, there's no way I'm doing my own cheat sheet. I can barely bring myself to do the actual work.
So I take it you must be used to reading documentation and picking up new languages pretty quickly? If you must keep going to the documentation to remember a function, copy it out. I don't see how needing to dig through out of order lists is any more useful than digging through long winded documentation. The point of a cheat sheet is not just remembering the thing, but finding it quickly.
