Soaring Society of America
Soaring Safety Foundation
International Scientific & Technical Soaring Organization
CFI-G.com
1-26 Association
Vintage Sailplane Association
Aircraft Owners Pilots Association
California Pilots Association

• 
• PilotWeb
• Temporary Flight Restrictions (TFR) Website
• Notices to Airmen (NOTAM) Website
• Special Use Airspace (SUA) Website
• Aviation Safety Reporting System

• 1800WXBRIEF.com

• Skydive Elsinore
• March Air Reserve Base

• Condor Soaring Simulator
• Silent Wings Soaring Simulator

• Aircraft Spruce
• Bruce's Custom Covers
• Cumulus Soaring
• FLARM
• K & L Soaring
• Mountain High Equipment & Supply
• Naviter
• Soaring Symposia Archive
• SPOT
• Trig Avionics
• Wings & Wheels
• XC Soar