1)   Phone Tone Decoder 1.5
PhoneTone Decoder can decode the DTMF touch key, FSK Caller-ID, Baudot TTY Code, or any custom phone tone from the PCM wave file or wave stream. It can also detect silence, ring-back, busy or other phone tone. It has the high efficient FFT module.

 2)   VTapi ActiveX 1.9
VTapi ActiveX Control you get everything you need for quality communications using Microsoft Visual Basic, Visual C++, or any other environment capable of hosting ActiveX components. Create IVR systems, answering machines, detect caller ID and more!

 3)   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.

 4)   DTMFDial 1.0.0.14
Emits DTMF tones including A, B, C and D using PC sound card. Features programmable memory, last 16 number redial and single instance tool-tray operation.