John Kew Pickleball
Independent pickleball paddle testing programme measuring properties such as swing weight, twist weight and spin.
Directory
Equipment labs
Independent measurement and testing of equipment.
Racketpedia
Database of instrument-measured specifications for tennis rackets, strings and padel rackets; basic data sheets are free.
Revspin
Table tennis equipment database where players rate rubbers and blades; ratings come from users, not lab tests.
Tennis Warehouse University
Research arm of the retailer Tennis Warehouse that publishes lab-measured racket and string data.