The Pascack Valley Regional High School District has always been very supportive of Team 1676. They've always allowed us to use the Tech Lab and Autoshop for building purposes, and we're allowed to stay pretty late (they kick us out around 11:30/12). Last year they started to financially support the team as well.
Because of all that, they are our biggest sponsor/supporter. Then we have corporate sponsors such as KPMG and Dassault Falcon Jet that monetarily support us. All in all I think we have around 15 companies that sponsor us in some way...our website has a more detailed breakdown.