| .C1 | The POV-Team | Fişiere de imagini 3D | Pov-Ray For Windows 3.x Scenes Advanced Newltpot File | Pov-Ray | The POV-Team |
| .C4D | MAXON Computer | Fişiere de imagini 3D | Cinema 4D Model File | MAXON Cinema 4D | MAXON Computer |
| .CAF | Apple | Fişiere de imagini 3D | Apple Core Audio File | Apple QuickTime Player | Apple |
| .CAG | Microsoft Corporation | Fişiere de imagini 3D | ClipArt Gallery Package | Microsoft PowerPoint | Microsoft Corporation |
| .CAL | Newera Software Technology, Inc. | Fişiere de imagini 3D | CALS Raster File | Adobe Photoshop | Adobe Systems Incorporated |
| .CAS | Autodesk, Inc. | Fişiere de imagini 3D | Autodesk Cascade License File | AutoCAD Architecture | Autodesk, Inc. |
| .CBZ | Open Source | Fişiere de imagini 3D | Comic Book Zip Archive File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CCB | Ambiera | Fişiere de imagini 3D | CopperCube Scene File | CopperCube | Ambiera |
| .CCP | Ambiera | Fişiere de imagini 3D | CopperCube JavaScript File | CopperCube | Ambiera |
| .CDB | Nokia | Fişiere de imagini 3D | Symbian Phonebook Database | Nokia PC Suite | Nokia |
| .CG | NVIDIA | Fişiere de imagini 3D | Cg Program | FX Composer | NVIDIA |
| .CG3 | CABRILOG | Fişiere de imagini 3D | Cabri 3D Document | Cabri 3D | CABRILOG |
| .CHO | Hash | Fişiere de imagini 3D | Animation:Master Choreography File | Animation:Master | Hash |
| .CHR | Crytek | Fişiere de imagini 3D | CryENGINE Character File | CRYENGINE | Crytek |
| .CLT | Clarity Legal | Fişiere de imagini 3D | Clarity Legal Transcript File | Clarity Legal Viewer | Clarity Legal |
| .CM2 | Smith Micro Software | Fişiere de imagini 3D | Poser Camera Set File | Smith Micro Poser | Smith Micro Software |
| .CMF | Creative Technology Ltd. | Fişiere de imagini 3D | Creative Music Format | Nullsoft Winamp | Nullsoft |
| .CMP | Microsoft Corporation | Fişiere de imagini 3D | Windows Connection Manager Profile | Microsoft Windows Server 2016 | Microsoft Corporation |
| .CORE | Unknown Developer | Fişiere de imagini 3D | Core Bitmap Image File | Unknown Software | Unknown Developer |
| .CORRECTION | Fanix Software | Fişiere de imagini 3D | Correction File | As-U-Type | Fanix Software |
| .CPD | Adobe Systems Incorporated | Fişiere de imagini 3D | RoboHelp Cache Project Database | Adobe RoboHelp | Adobe Systems Incorporated |
| .CPY | Autodesk, Inc. | Fişiere de imagini 3D | 3ds Max Copy Track File | Autodesk 3ds Max | Autodesk, Inc. |
| .CR2 | Canon Inc. | Fişiere de imagini 3D | Canon Digital Camera Raw Image File | CodedColor PhotoStudio | 1Stein |
| .CRF | Open Source | Fişiere de imagini 3D | Cal3D Binary Materials File | Cal3DViewer | Open Source |
| .CRZ | Smith Micro Software | Fişiere de imagini 3D | Compressed Poser Character Rigging File | Smith Micro Poser | Smith Micro Software |
| .CSD | Valve | Fişiere de imagini 3D | Steam Game Data Backup File | Steam | Valve |
| .CSF | Intergraph Corporation | Fişiere de imagini 3D | GeoMedia Coordinate System File | Intergraph GeoMedia | Hexagon Geospatial |
| .CSM | Autodesk, Inc. | Fişiere de imagini 3D | Character Studio Marker File | Character Studio | Autodesk, Inc. |
| .CSO | Microsoft Corporation | Fişiere de imagini 3D | Compiled Shader Object File | Microsoft Visual Studio | Microsoft Corporation |
| .CST | Smith Micro Software | Fişiere de imagini 3D | Manga Studio Story File | Manga Studio | Smith Micro Software |
| .CU3 | Computerinsel GmbH | Fişiere de imagini 3D | Photoline4 Curves Clut File | Photoline | Computerinsel GmbH |
| .CWZ | New Wave Concepts | Fişiere de imagini 3D | Circuit Wizard File | Circuit Wizard | New Wave Concepts |
| .CXM | Unknown Developer | Fişiere de imagini 3D | QuadColor Color Correction Master Data | Unknown Software | Unknown Developer |
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