National Flute Association http://www.nfaonline.org/
The National Flute Association hosts the largest annual flute convention in the US every August. These conventions feature renowned flutists and flute teachers in concerts, masterclasses, and workshops, as well as several competitions for both student and professional flutists. Their website also includes an extensive listing of upcoming national and international flute masterclasses and workshops and several other flute resources.
The Arizona Flute Society
The Arizona Flute Society hosts several festivals, workshops, concerts, masterclasses, and competitions every year. Their website includes information about these activities, as well as information about joining the Arizona Society's flute choirs.
Flute and Piccolo Fingering Charts http://www.wfg.woodwind.org/flute/
Larry Krantz Flute Pages http://www.larrykrantz.com/
An extensive online library of pedagogical articles and other flute resources.
Flute World http://www.fluteworld.com/
Retailer of instruments (including both new and used flutes), sheet music, recordings, and flute accessories.
Carolyn Nussbaum http://www.flute4u.com/store/Instruments/
Retailer of instruments (including both new and used flutes), sheet music, recordings, and flute accessories.