Parachute Jump Calculation
- Freefall simulation, to determine the most likely trajectories of (groups of) skydivers with different fall rates. [Java]
- http://lensmoor.org/cgi-bin/chute.cgi

Sport Parachutist's Safety Journal
- Information about equipment, environments and human factors.
- http://www.makeithappen.com/spsj/

Dropzone Safety and Training
- Safety and training advice for skydivers at all levels. Skydiving emergencies, student course material, and related articles.
- http://www.dropzone.com/safety/

Skydiving Safety Training
- Website on skydiving safety training.
- http://www.afn.org/skydive/sta/