Dropzone Safety and Training
Safety and training advice for skydivers at all levels. Skydiving emergencies, student course material, and related articles.

Parachute Jump Calculation
Freefall simulation, to determine the most likely trajectories of (groups of) skydivers with different fall rates. [Java]

Parachutes Safely
Information on flying and landing high performance parachutes with safety in mind.

Skydiving Safety Training
Website on skydiving safety training.

Sport Parachutist's Safety Journal
Information about equipment, environments and human factors.