| .cui |
Autodesk Custom Workspace File |
| .cd5 |
Chasys Draw Image File |
| .cgz |
Cube Map File |
| .celtx |
Celtx Project File |
| .cna |
Catena Project File |
| .cbt |
Comic Book TAR File |
| .curxptheme |
CursorXP Theme File |
| .cursorfx |
CursorFX Theme File |
| .cvd |
Bitdefender Virus Definition File |
| .cdp |
Trainz Simulator Content Dispatcher Pack |
| .cdp2 |
Trainz Classics Content Dispatcher Pack 2 |
| .cad |
BobCAD-CAM File |
| .ct |
Cheat Engine Cheat Table |
| .crtx |
Office 2007 Chart Template File |
| .cdg |
Compact Disc Plus Graphics Image |
| .crc |
Total Commander Checksum File |
| .clm |
MagicJack Call Log File |
| .ctp |
CakePHP Template |
| .cpx |
Oracle ADF Binding Context File |
| .clpi |
Blu-ray Clip Information File |
| .cbf |
Calendar Builder File |
| .clb |
COM+ Catalog File |
| .cav |
Comodo Virus Definitions File |
| .cdl |
CADKEY Wireframe Design File |