Well, I speak:
Swiss German, as my mother tongue (Berne dialect, generally, but with my relatives I speak some kind of mixed thing between Berne and Zürich German, since my mother is from Zürich. Anyway, I understand (almost) every Swiss dialect, and can usually tell which part of the country it's from, just like everyone here does.)
Italian, as my second mother tongue. I learned Italian first, but now my Italian is somewhat weak - I am still fluent, but my vocabulary really sucks. I guess that's mostly because I lack practice and because I hardly ever read stuff in Italian
Then, well, Standard German, if you want to count it as a different language (I'm not doing it in the poll, but as one might remind, the distinction dialect-language is a political one, not a linguistic one). I guess that now I'm almost indistinguishable from any speaker from Germany (usually Swiss speakers have an accent when they speak Standard German, but I've known so many people from Germany that I adopted their way of speech)
Other languages I've studied:
French - well, this was pretty cool, since knowing Italian helped me a lot with some peculiarities, while at the same time, learning about French grammar helped me understand Italian better, especially those parts where I had some kind of vague feeling how it worked, but not the exact details (especially the subjunctive, although there are some differences between the French subjonctif and the Italian condizionale). I guess I lack somehow the practice, but still I think I'm pretty good at it.
Then English, well, as you can see. My passive knowledge is very good, such is the influence of the internet (and of Harry Potter and GRR Martin and the like), I think there are few things I don't understand when I read them. Hearing is somewhat harder, depends much on the accent. Once watched a film with the main characters being from Belfast - didn't understand a thing, at first. Writing is pretty ok, I guess, while as for speaking - well, yeah, let's say, I could need some practice. And an accent - I mean, what I'm currently doing is pronouncing every word just the way I feel like, not even consistently (so let's say, for "duty" once I'd say 'doodie' and once 'djootie', etc.).
Then there's some "dead" languages I did. First of all Latin, well, I guess apart from the obscure declensions (u and e) and some peculiarities with futures and subjunctives (they're too similar), I guess I still know most of the grammar. As for the vocabulary, well I've forgotten much, especially since we always could use the dictionary.
Next, Ancient Greek. Well, I couldn't say I'd still master the verbal system, I mean... with all those contractions and whatnot, there is too much homonymy, etc. Declensions are easy, though. But it's a very, very beautiful language.
Then, those two semesters of Biblical Hebrew... well, I've forgotten much. I can still read a text, albeit slowly, if it has vowel signs, but I never bothered to learn any vocabulary and the morphology and phonology is quite complex, so I wouldn't be able to understand much now.
Well, and for the future I plan to learn some more languages. First, I'm taking a Czech course next semester. That's a language I've wanted to study for quite some time, but as of yet I know little more than how to pronounce it and some basic phrases (I even tried to order my food in Czech at the McDonald's in Prague, two years ago, but didn't understand when they asked me whether I wanted ketchup or mayo
). Then, there is also a Tamil class - I guess, I'll just try to see if I like the language and if it works to do two languages at the time (after all, they're completely unrelated).
Then, there's a couple of more languages I'd like to learn although I probably won't be able to learn all of them: Lakhota, Quechua, Basque, Modern Greek, Finnish, Japanese, Tagalog, Mapudungun, etc.
What I don't want to learn is one of these SE Asia languages like Thai, Burmese, etc. This is purely subjective, but I don't like the sound of them, and besides I'm not so much into isolating languages, let alone into tones.
And just as for this "critical age" stuff ("you can't master any language when you're older than 8") - that's a very generativist view, and one I would challenge. Although it becomes certainly harder to learn languages at later age, there hasn't been sufficient proof for the theory that there is one clear cut. Actually, what is much more important is the motivation. Children who learn a new language are motivated to imitate what they hear - that is why they will have no foreign accent and the like. But adults often lack this motivation - after all, if Arnold Schwarzenegger can become governor of California with that Austrian accent of his, why would he want to change it?