Here are some links which I have found useful and/or indispensable.
Bands:
The Old Masters Jazz Quartet
Red Raville Big Band Sounds
Kevin Dorsey Collective
Instrument and gear resources:
Musician's Friend (Gear for the working musician)
American Music Supply (More gear for the working musician)
Woodwind & Brasswind (Great deals on instruments)
1800USA Band (Great deals on B-Stock instruments)
Education:
Happy Jack Music - band materials written by Brendan Van Epps and Erin Tapia, including:
• a 3-level Band Method;
• THE Sight Reading Book (aligned with NYSSMA All-State Sight-Reading Standards);
• a rhythm curriculum, and;
• a book of secondary studies that follows Book 3 of his method book.
* If my band method doesn't work for you, maybe Brendan's will!
JW Pepper (Great place to buy music)
Penders Music (Another great place to buy music, especially jazz!)
Dorn Publications (THE resource for saxophone music on the web!)
Jazzbooks.com (Great jazz resource here; books, play-alongs, etc.)
Kendor Music (Music for big band and combos)
West Music (Great resource for classroom music and materials)
Kididdles.com (Music and lyrics for kids)
Technology:
Apple.com
Rapidweaver (I used this app to create this website; very intuitive)
Finale Music (Professional music notation software)
Rogueamoeba.com (Music utilities for your Mac)
Hairersoft.com (Amadeus music editing software)