Site of the professional violinist Michael Uzhegov. There are a lot of information, notes, programs, records, etc. Unfortunately this website works only in Russian. but anyway you can find there a lot of helpfull for you.
http://www.7not.ru Site of the group of the great musicians and not only musicians L.Gurilyov, S.Akhtyamov, D.Nizyaev and I.Petrov, There is a lot of articles about the music, composers, notes and sounds editors, forum where you can always consider any musical problems, notes, courses of the music lesseons, the musicscores shop, etc. Unfortunately this website works only in Russian.