American Crossword Puzzle Tournament

Boston Chamber Music Society

Chameleon Arts Ensemble

Emmanuel Music, a musical home for many of Boston's top musicians at Emmanuel Church

Frank Music Company, New York City's best shop for classical sheet music of all publishers

Leo Ornstein and his music

MusicUnitesUS

New England String Ensemble

Petrucci Music Library (formerly the International Music Library Project), a great resource for sheet music research

WorldCat, a global catalog of library collections, another great resource for sheet music research

Yesterday Service, Inc., a great Cambridge MA shop for classical sheet music of all publishers