The Triple-P (Ping Pong Partner) Designer contacts for a solo practice machine that makes the return of the ball unpredictable. http://pingpongpartner.tripod.com/

Tibhar Manufacturer of net systems, balls, paddles and accessories; site is in German, English and French. http://www.tibhar.com/

Newgy Products, information center and contacts for this manufacturer of robots (practice machines). http://www.newgy.com/

Joola Product information and contacts for this manufacturer of rubber, blades, balls, table systems and robots. http://www.joola.de/

TTmatic Product descriptions and contacts for this German manufacturer of practice machines. http://www.ttmatic.de/

Donic Product descriptions for this German manufacturer's line of tables, blades, rubbers, robots and accessories. http://www.donic.de/

Shanghai Double-Happiness (Group) INC Manufacturer and exporter of table tennis tables, balls, and rackets. http://www.dhs-sports.com

Sweden Table Tennis AB Manufactures balls, blades, bats, rubbers, tables, nets, and accessories and apparel for table tennis. Includes distributor list and related links. http://www.tabletennis.se/

P-equipe Manufacture of a full line of Pilates equipment, in Buenos Aires Argentina. http://www.p-equipe.com.ar