Free Database of virtually every piece of music ever written that is in the public domain.

Warning: this site is hosted in Canada which as differing copyright laws than the U.S.  

A great resource for cellists of any level. The blog of the famous cellist of the Cleveland String Quartet and now Professor at the New England Conservatory of Music in Boston. 

Great for anyone pursuing a career in music. Dana nails it on the head every single time.