| .c4 |
JEDMICS Image File |
| .cenon |
Cenon Project |
| .clkp |
Clicker Object Palette File |
| .clkbd |
Clicker Board Set |
| .cadoc |
Clicker App Document |
| .cia |
CTR Importable Archive |
| .cannedsearch |
Apple Predefined Search |
| .comic |
Comic Life Comic |
| .customdestinations-ms |
Windows 7 Jump List File |
| .cetrainer |
Cheat Engine Trainer File |
| .chai |
Chaimera Artwork File |
| .chait |
Chaimera Artwork Template |
| .crec |
Lync Video File |
| .coverage |
Visual Studio Code Coverage Report |
| .cmo |
ASUS BIOS File |
| .csg |
CounterSketch Design Project |
| .cmpkg |
craftersmine Package |
| .calb |
Coolect Album File |
| .ce |
ComputerEyes Image |
| .cut |
Dr. Halo Bitmap Image File |
| .cbk |
Backup Configuration File |
| .ca |
Initial Telnet Cache |
| .chn |
Ethnograph Data |
| .cvc |
cVideo |