A lot of JavaScript for... I dunno, 5 years? It's been a long while.
Dabbled in bash (ew), have some Python experience (way better than bash, but still ew), haven't programmed much in Arc[1], but I love the language. I've also written less than 100 lines in a few other languages.
That's about it, unfortunately. I've read about plenty of other languages, though, ranging from Java to C# to Haskell to Smalltalk. I've been pretty interested in Haskell lately, I might try that out sometime.
So... primarily JavaScript, which I'm thankful for because it's actually a pretty nice language, once you get past the cruft and warts. It has proper lambdas and closures, unlike Python! The DOM's an absolute mess, though...
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* [1]: It's a lot easier to just discuss it. Also, I've been spending my time writing an Arc interpreter in Python so that I can eventually program in Arc. :P It's been a pretty fun learning experience, though.