DLL Manufacturers
- CIVEK Development Consultants, Inc.
- CK Softwareentwicklung, Christian Kratzer
- ClassWorks
- Clever Age
- CLNetMediaCDS Module
- CLNetMediaDMA Module
- CodeGuru
- Codejock Software
- Codelobster Software
- Codemasters
- CodePoet Computing
- Coding Technologies GmbH
- Color Conversion Library
- Color Flatbed Scanner
- Coltec M.E.
- Comapq
- combit GmbH
- Comet Systems
- Common Controls Replacement Project
- Common Group
- CommonName
- COMODO
- Compaq
- COMPAQ Inc.
- Compare
- ComponentAce
- ComponentOne LLC
- CompuApps Inc.
- Computall Services
- Computer Associates
- ComSquare AG
- Comtrol Corporation
- Concept Software Inc.
- Concord Technologies, Inc.
- Conduit Ltd.
- Conexant Systems Inc.
- Conifer Software
- Connectix Corporation
- ContextH Application
- CoreAudioApi
- Corel Corporation
- Corel TW Corp.
- Cortado AG
- Cosmo Software
- CREAT Studio
- Creative Development LTD
- Creative Labs
- Creative Technology Ltd.
- Creo Inc.
- Crownwood Consulting Ltd
- Crownwood Software Ltd
- Crystal Decisions Inc.
- Crystal Dew World
- Crystal Reports Analyzer Module
- Crystal Reports for Visual Basic
- Crystal Semiconductor Corp.
- CrystalIDEA Software
- Crytek
- CSR, plc
- CtrlFactory
- CudaUtil Dynamic Link Library
- CVS Information System
- Cyber Pass Inc.
- CYBERAKT INC.
- CyberCash, Inc.
- CyberLink
- CyberMedia, Inc.
- Cycling 74
- Cydoor Technologies L.T.D
- D-Link
- d16 group
- Damian Pasternak
- Danger Close Games
- Daniel Parnell
- Daniloff s Anti-Virus Labs
- Dart Communications
- Dassault Systèmes SolidWorks Corp.
- Data Design Group Inc
- Data Dynamics
- Data Encryption Systems Limited
- Data Techniques, Inc.
- DataDirect
- DataFocus, Inc.
- dautil Dynamic Link Library
- Dave Brotherstone.
- Dave Brown
- David Harris
- David Majda
- David Turner, Robert Wilhelm, & Werner Lemberg
- Davide Icardi
- DbAccess Dynamic Link Library
- DC Micro Development
- Decebal Mihailescu
- Deerfield.com
- Dell
- DelphiZip
- Delrina Corporation
- Derick Rethans
- Desaware Inc.
- Design Science Inc.