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- Technopower
- Techspace Aero — Belgium
- Teledyne Continental Motors — U.S.
- Thaheld
- Scott — UK
- Termo-Jet
- Thielert — Germany
- Thomas
- Thorotzkai
- Thunder
- Tips
- Tips & Smith
- TNCA
- Tokyo Gasu Denki — Japan
- Trace Engines — USA
- Train
- Tumansky — Russia/Soviet Union
- Turbo Research (Orenda Engines)
- Turbo-Union — Germany
- Turboméca
- Turboméca/HAL
- Turbomecanica - Romania
- Turkish Aerospace Industries - Turkey
Read more about this topic: List Of Aircraft Engine Manufacturers