| .textfactory |
BBEdit Text Factory |
| .tmlanguage |
TextMate Language Grammar File |
| .tld |
Tag Library Descriptor File |
| .tns |
TI-Nspire Document |
| .tpx |
DeLorme Topo Project File |
| .twig |
Twig Template |
| .tpk |
Gear Watchface Design Build File |
| .tiprogram |
TI-Basic Program File |
| .tmproject |
TextMate Project |
| .tmpl |
Xfire User Interface Template |
| .tbd |
Visual Studio Toolbox Data File |
| .ui |
User Interface File |
| .uml |
UML Data Object Model |
| .umlclass |
UML Class Model |
| .uft |
Torque Font Cache File |
| .vb |
Visual Basic Project Item File |
| .vcxproj |
Visual C++ Project |
| .vcproj |
Visual C++ Project File |
| .vdproj |
Visual Studio Setup and Deployment Project |
| .vhd |
Virtual PC Virtual Hard Disk |
| .vbproj |
Visual Studio Visual Basic Project |
| .v |
Verilog Source Code File |
| .vtm |
Visual Tool Markup Language Document |
| .vbx |
Visual Basic Custom Control |