Mad Rock Mad Pad Crash Pad. Used for bouldering this pad provides cushion for falls from a height of about 10 feet, maybe a bit more..
Heavy Grips comes in 100,150,200,250,300,350 lbs. These are for serious grip strength.
Core Stix at the Los Angeles Fitness Expo 2013! I tried these myself these are awesome for engaging the core the the whole body.
These are affordable and EFFECTIVE. Calisthenics may not have a better tool. The gymnast rings rock (no pun intended).
EDGE Mobility Bands: Health & Personal Care
Rogue VooDoo Floss Bands
Vintage Gymnastics @ Amsterdam Modern
Amazon.com: Gaiam Grippy Yoga Towel: Sports & Outdoors
Russian Kettlebell - 16kg (35lb) A must have in any training arsenal.