| .cgr |
CATIA Graphical Representation File |
| .cpf |
Cognos Project File |
| .cex |
SolidWorks Enterprise PDM Vault Export File |
| .cxp |
CX-Programmer Project File |
| .cskin |
CD Art Display Skin File |
| .cos |
Capture One Settings File |
| .costyle |
Capture One Style File |
| .copreset |
Capture One Preset File |
| .cptm |
Captivate Theme File |
| .comp |
Fusion Composition File |
| .cmate |
ControllerMate File |
| .cpdx |
Adobe Captivate Storyboard Project |
| .cwf |
CorelDRAW Workspace File |
| .cm |
CLEO Custom Mission |
| .cus |
AutoCAD Custom Dictionary File |
| .cyberduckprofile |
Cyberduck Connection Profile |
| .cyberducklicense |
Cyberduck Donation Key |
| .csplan |
SPSS Sampling Plan File |
| .cmmtheme |
CleanMyMac Theme File |
| .ctbodyfitting |
CrazyTalk Animator Actor Fitting File |
| .colourscheme |
Speedy Browser Colour Scheme File |
| .cboard |
Final Cut Pro Color Board Preset |
| .cenon |
Cenon Project |
| .crop |
Crick Software Options File |