KDTele Tools
- A collection of controls for the telephony (play and record messages on the phone, retrieve caller ID, detect digit tones, fax, file transfer). [Components, Commercial]
- http://www.kaed.com/kdtele/

ExceleTel Inc.
- A collection of ActiveX and VCL controls for the development of telephony applications.
- http://www.exceletel.com/

EasyDial ActiveX Control
- Let write code to dial and connect to ISPs. [Component, Shareware]
- http://www.pclubricant.com/easydial/