| tfil | World of Warcraft Software Update |
| tfl | ALKFLOW Total Flow Data |
| tfl | Tific Client Data |
| tfl | Trimble Field Link Data |
| tflow | MTFLOW Data |
| tfr | 4D Database Windows Formula Document |
| tfrm | 4D Database Mac OS X Formula Document |
| tfv | YETI Vegetation Plot Database Export File |
| tfx | Avid Pro Tools Eleven Rack Presets |
| tfy | Terrafy Module |
| tfz | FBS Vehicle Database |
| tg2 | tg2htm Saved Metadata |
| tg3 | TexGen 3 Geometry Data |
| tgc | Terragen Clip File |
| tgd | Nimbus 7 SAMS Data |
| tgd | Nimbus 7 SAMS Raw Data |
| tgd | Terragen 2 World |
| tgf | libigl Control Handle Graphs |
| tgf | Stonevoice Translator Tag Data |
| tgf | Tree Generator Tree Data |
| tgg | eMoflon Triple Graph Grammars Data |
| tgl | SkyMap Target Lists |
| tgmd | WDTV ThumbGen Movie Metadata |
| tgmg | TabGroups Manager for Firefox Exported Group Data |
| tgo | Terragen Object File |
| tgp | FM-ONE Target Protocol Data |
| tgp | ThumbGen Profile |
| tgs | GSTree Tree Data |
| tgt | Carlson 2016 Template Grade Table Data |
| tgt | Spyder2PRO Target Data |
