Coe Percussion - Custom builder of marimbas and xylophones.
Ross Mallet Instruments, Inc. - Manufacturer of mallet percussion instruments including marimbas, xylophones, vibraphones, chimes, bells and marching percussion. Contains inventory, practice room, artists, and information for educators.
Rhythm Bones Central - History, regional names, events calendar, Bones Fests, bones players, vendors, Rhythm Bones Society membership form, mailing list, bibliography, discography, and videography.
Waywood Music - Information on how to choose, set-up, tune and maintain drums, percussion, cymbals and hardware. Free MP3 downloads.
Wikipedia - Percussion Instrument - Hyperlinked encyclopedia article provides information on the history, classification, function and notation of percussion instruments.