- ALCo
- Andrew Barclay
- Avonside
- Narrow Gauge Bagnall's
- Baugley Cars Ltd
- Bellis & Seeking
- Beyer Garratt
- De Winton
- Fairlie
- George England
- Great Western Narrow Gauge (Corris, Welshpool & Vale of Rheidol)
- A. Horlock & Co
- Hudswell Clarke
- Narrow Gauge Hunslet's
- John Fowlers & Son
- Isle of Man Steam Railways
- Kerr Stuart
- Manning Wardle
- Leary
- Lynton & Barnstaple Railway
- Orenstein & Koppel
- Peckett
- Polish Locomotives
- Sharp Stewart & Co
- South African Railways
- Steamplex
- Thomas Green & Co
- Tallylyn Railway
- William Spence