Calltrol  
   Object Telephony Server (OTS) platform for integrating telephony support into other applications.
   http://www.calltrol.com

Arion Software  
   Developer component for managing incoming ISDN calls.
   http://www.arion.gr/isdn/activex/index.htm

Micro Seven  
   Mini-PBX simulators.
   http://www.microseveninc.com

Xentec  
   Create and convert audio and voice files for computer telephony.
   http://www.xentec.be/

Pronexus  
   Rapid application development tools for voice, fax, and speech.
   http://www.pronexus.com/prod

ipNetfusion  
   Automated telecom testing products.
   http://www.ipnetfusion.com

Black Dolphin Technologies  
   Software components for computer telephony integration.
   http://www.bdttel.com

Stack Dynamics  
   Portable Signaling System 7 (SS7) software.
   http://www.stackdynamics.com

Cool IVR  
   Rapid CTI/IVR development tool for Windows XP/2000.
   http://www.coolivr.com

CT Messenger TAPI ActiveX Components  
   Produces TAPI compliant scriptable COM objects to quickly embed over-the-phone notification, text paging or SMS into applications.
   http://www.ivrsoft.com/ct-messenger.htm

CIDMage Caller ID Generator  
   Software to generate SDMF, MDMF, CWCID and more Caller ID signals.
   http://codegods.net/cidmage/

Tele Express XII Co.  
   Provides development services to the alternative telecom operators. Besides, moved to "development & test tools" category.
   http://www.tele-express.net