- C4Soft 9
- Cachupa 1
- CADSoftTools 2
- Calendar Consultants 1
- CatchySoft.com 1
- CE-Infosys Pte Ltd 1
- Chaganava Studio 1
- Chilkat Software 1
- Chris Giles 1
- Clean PC Software 2
- clock-desktop.com 1
- Cloudeight Internet 1
- CloudStars 4
- Coldrg Co., Ltd. 9
- CommFront Technologies 1
- ComponentGo 1
- ComponentSpot 1
- Computer-Screensavers.com 1
- Conkurent, LLC 1
- CS Group 1
- CSEP Technologies 1
- Cyber Samurai Software - 1AutoWiz 1
- Cyber-WebCom 1
- CyTeG (CyberTech group) 1
