| Extension | File Description |
| .CDDS | Uncommon Files |
| .CDE | Uncommon Files |
| .CDEV | Uncommon Files |
| .CDEVSAMPLE | Uncommon Files |
| .CDH | Uncommon Files |
| .CDJ | Uncommon Files |
| .CDK | Uncommon Files |
| .CDKEY | Uncommon Files |
| .CDN | Uncommon Files |
| .CDPRJ | Uncommon Files |
| .CDQ | Uncommon Files |
| .CDRZIP | Uncommon Files |
| .CDS | Uncommon Files |
| .CDSC | Uncommon Files |
| .CDSG | Uncommon Files |
| .CDU | Uncommon Files |
| .CDV | Uncommon Files |
| .CDW | Uncommon Files |
| .CDXL | Uncommon Files |
| .CDZ | Uncommon Files |
| .CE0 | Uncommon Files |
| .CE1 | Uncommon Files |
| .CE2 | Uncommon Files |
| .CE3 | Uncommon Files |
| .CE4 | Uncommon Files |
| .CE5 | Uncommon Files |
| .CE6 | Uncommon Files |
| .CE7 | Uncommon Files |
| .CE8 | Uncommon Files |
| .CE9 | Uncommon Files |
| .CEA | Uncommon Files |
| .CEC | Uncommon Files |
| .CED | Uncommon Files |
| .CEE | Uncommon Files |
| .CEF | Uncommon Files |
| .CEG | Uncommon Files |
| .CEH | Uncommon Files |
| .CEI | Uncommon Files |
| .CEJ | Uncommon Files |
| .CEK | Uncommon Files |
| .CEL2 | Uncommon Files |
| .CELL | Uncommon Files |
| .CELLAR | Uncommon Files |
| .CELTIC | Uncommon Files |
| .CEN | Uncommon Files |
| .CEO | Uncommon Files |
| .CEP | Uncommon Files |
| .CEQ | Uncommon Files |
| .CES | Uncommon Files |
| .CET | Uncommon Files |
| .CEU | Uncommon Files |
| .CEV | Uncommon Files |
| .CEW | Uncommon Files |
| .CEY | Uncommon Files |
| .CEZ | Uncommon Files |
| .CF0 | Uncommon Files |
| .CF1 | Uncommon Files |
| .CF2 | Uncommon Files |
| .CF3 | Uncommon Files |
| .CF4 | Uncommon Files |
| .CF5 | Uncommon Files |
| .CF6 | Uncommon Files |
| .CF7 | Uncommon Files |
| .CF8 | Uncommon Files |
| .CF9 | Uncommon Files |
| .CFB | Uncommon Files |
| .CFD | Uncommon Files |
| .CFDG | Uncommon Files |
| .CFE | Uncommon Files |
| .CFF | Uncommon Files |
| .CFH | Uncommon Files |
| .CFI | Uncommon Files |
| .CFIG | Uncommon Files |
| .CFJ | Uncommon Files |
| .CFK | Uncommon Files |
| Extension | File Description |
| .CFN | Uncommon Files |
| .CFO | Uncommon Files |
| .CFP | Uncommon Files |
| .CFQ | Uncommon Files |
| .CFT | Uncommon Files |
| .CFU | Uncommon Files |
| .CFV | Uncommon Files |
| .CFW | Uncommon Files |
| .CFX | Uncommon Files |
| .CFY | Uncommon Files |
| .CFZ | Uncommon Files |
| .CG0 | Uncommon Files |
| .CG1 | Uncommon Files |
| .CG2 | Uncommon Files |
| .CG3 | Uncommon Files |
| .CG4 | Uncommon Files |
| .CG5 | Uncommon Files |
| .CG6 | Uncommon Files |
| .CG7 | Uncommon Files |
| .CG8 | Uncommon Files |
| .CG9 | Uncommon Files |
| .CGA | Uncommon Files |
| .CGB | Uncommon Files |
| .CGC | Uncommon Files |
| .CGD | Uncommon Files |
| .CGE | Uncommon Files |
| .CGG | Uncommon Files |
| .CGH | Uncommon Files |
| .cgi | Uncommon Files |
| .CGJ | Uncommon Files |
| .CGK | Uncommon Files |
| .CGL | Uncommon Files |
| .CGN | Uncommon Files |
| .CGO | Uncommon Files |
| .CGQ | Uncommon Files |
| .CGS | Uncommon Files |
| .CGT | Uncommon Files |
| .CGU | Uncommon Files |
| .CGV | Uncommon Files |
| .CGW | Uncommon Files |
| .CGX | Uncommon Files |
| .CGY | Uncommon Files |
| .CGZ | Uncommon Files |
| .CH | Uncommon Files |
| .CH0 | Uncommon Files |
| .CH1 | Uncommon Files |
| .CH10 | Uncommon Files |
| .CH2 | Uncommon Files |
| .CH4 | Uncommon Files |
| .CH5 | Uncommon Files |
| .CH6 | Uncommon Files |
| .CH7 | Uncommon Files |
| .CH8 | Uncommon Files |
| .CH9 | Uncommon Files |
| .CHANG | Uncommon Files |
| .CHANGE | Uncommon Files |
| .CHANGELOG | Uncommon Files |
| .CHANGER | Uncommon Files |
| .CHANGES | Uncommon Files |
| .CHAR | Uncommon Files |
| .CHAR1 | Uncommon Files |
| .CHAR2 | Uncommon Files |
| .CHAR3 | Uncommon Files |
| .CHAR4 | Uncommon Files |
| .CHART | Uncommon Files |
| .CHART2 | Uncommon Files |
| .CHATLOG | Uncommon Files |
| .CHB | Uncommon Files |
| .CHC | Uncommon Files |
| .CHE | Uncommon Files |
| .CHEAT | Uncommon Files |
| .CHEATS | Uncommon Files |
| .CHECK | Uncommon Files |
| .CHECKER | Uncommon Files |
| .CHESSREV | Uncommon Files |
