| .ctf |
WhereIsIt Catalog File |
| .ckd |
Kubotek Design Container |
| .cp |
Xcode C++ Source File |
| .csproj |
Visual Studio C# Project |
| .csh |
Photoshop Custom Shapes File |
| .contact |
Windows Contact File |
| .cpg |
ESRI Code Page File |
| .ctb |
AutoCAD Color-Based Plot Style File |
| .cva |
HP System Software Manager Information File |
| .cdd |
ConceptDraw PRO Document |
| .cdb |
Symbian Phonebook Database |
| .catproduct |
CATIA V5 Assembly File |
| .clg |
Windows Catalog File |
| .chr |
Doki Doki Literature Club! Character File |
| .cdmm |
ConceptDraw MINDMAP Document |
| .cls |
LaTeX Document Class File |
| .cub |
Analysis Services Cube File |
| .cdx |
Compound Index File |
| .cdf |
Computable Document Format File |
| .cnf |
MySQL Configuration File |
| .cst |
Manga Studio Story File |
| .clp |
CrazyTalk Clip File |
| .ccp |
CopperCube JavaScript File |
| .cddz |
ConceptDraw PRO Document |