Piano: I'm at the formal competition level (yep, tuxedos and stuff) in this instrument, and have to give a recital every semester in university. As of now, I am focusing on Liszt, Chopin, and Brahms in preparation for my senior year lecture recital.
Naturally, with pianistic skills and experience and knowledge as a musician, I can also do synth.
Guitar: Picked this up in high school; I know more than enough to be in a band, although I'm not spectacular or anything. Acoustic, electric, bass guitars I can do, but most self-respecting musicians know how to play the guitar anyway.
Drums: Same deal here as with the guitar.
Flute: Dabbled a bit in it, but not really that good at it. Can play simple stuff, such as the sequences sometimes used in pop music.
Cello: Same deal here as with the flute.
I also have perfect pitch and the ability to play by ear without the need to transcribe. I also know how to play the harmonica, recorder, glocks, xylophones and other easier instruments/percussion.
Although, all in all, I feel how many instruments you know how to play isn't important at all; it's how good you are at them. My pianism far surpasses the other instruments I can play, but it's more than enough. God knows how many times I've just sat in front of the piano playing songs I really liked by ear. In fact, just yesterday, I improvised "Light Colors" from Tomoyo After and the ending song from To Heart 2 XRATED.
I'll take this opportunity to advertise that
piano thread of mine.