Yes! We have Preliminary, then 8 grades, then Associate and Licentiate here. I gave up on exams long ago as I get horrible nerves (as in, I burst out crying) but I continued to practice as if I had end-of-year exams. In the order I learned:
Piano - up to 8th grade, although somewhat limited in repertoire because I have very small hands (no Liszt or Rachmaninoff *sobs*). Mostly classical piano, I love my Beethoven and Chopin especially, but I also do a lot of improvisation.
Singing - soprano, have sung songs and done exercises consistently up to associate level (2nd highest). Used to sing a lot of opera (esp Verdi, Bizet, Puccini), but have moved into folk and renaissance songs more recently, as I haven't been able to train my voice as regularly (i.e. A few hours daily) and manage to keep my range intact, since I have been working crazy hours over the last few years. I love singing in different languages and exploring folk music from around the world - Greek, Armenian, Irish, Scottish, Welsh, English, Yiddish, Arabic, Turkish, Spanish, Italian, French, German, ... I try to learn as much of the languages as possible, so I actually can understand and interpret what I'm singing, as well as use correct pronunciation and inflection! I have a decent grasp of French and some skills in Spanish, Greek, German, Italian and the Gaelic languages. It helps me explore my dual passions of linguistics and musicology.
Flute - started off learning the fife before moving onto the flute, which is actually a lot easier on the mouth and fingers! Can play up to 6th grade in level. Once again play a fair bit of folk music but also plenty of Faure, Gluck, Mozart, Tarrega, Mercadante etc. It puts a bit more "light" into my music repertoire, given that I generally lurk around the gloomy end with my vocal and piano choices. Occasionally I fiddle round with bamboo flutes to experience a different tone.
Recorder - a recent addition, although I learned the basics as a kid. Had a bit of a recorder-buying spree and ended up with two soprano recorders (one wood, one plastic), a sopranino and an alto. Had they had the tenor in stock then I would have walked out with that too! Most of the music I play on recorder is either renaissance pipe music and baroque music.
I'd love to learn a bowed string instrument (probably the cello) but my fingers really aren't made for playing any string instrument, bowed or plucked. Which sadly also puts the lute out of the realms of possibility. Given my failings there I would love instead to learn the oboe. I had some good experiences experimenting with a bassoon so I'm fairly optimistic. My clarinet experiences were less promising (I ended up sounding like an angry duck!) so it may be that double reeds are more my thing. I've played the bugle a bit but I hate the taste of brass so unless someone lends me a solid gold trumpet I doubt I'll explore further