1)   TAPIEx ActiveX Control 3.2
Telephony development Control, Extensition of Microsoft TAPI2.0,support multi-lines, help you build you IVR,CTI system. Features:TTS, SR, Conference,Transfer, Caller ID, Digital Record/ Playback, Detect DTMF, DTMF and so on.

 2)   CallTTY TDD software 2.0
A program to communicate with phone TTY/TDD devices (Telecommunications Devices for the Deaf) via a sound card or via Skype Internet-phone, without TTY modem.