VoiceXML Gateway for SIP based VOIP service, traditional PSTN phone services, and Skype. TAPI development API for interactive telephony application. High level development platform based on W3C VoiceXML. Supports text-to-speech, voice recognition, DTMF tones for both inbound, outbound apps. Works with SIP based VOIP services, Skype, and traditional phone services. Voicent Voice XML gateway API , SDK, tutorial, sample code available online. Free download at http://www.voicent.com/download. Developer can integrate Voicent Gateway easily with http web interface, command line interface. Samples are available in C++, Perl, and PHP languages. Applications such as autodialers, phone alert software, and inbound IVR systems can be created without using TAPI programming. Supports text-to-speech, voice recognition, DTMF tones for both inbound and outbound apps. An open source based web server is included but not required. Voicent Developer SDK is also available for commercial developers. A command line simulator is included in the SDK to accelarate development process. Voicent provides developer network annual subscription and support. Included are one copy of AutoReminder Professional version or BroadcastByPhone professional version. Multi-phone line support. A must have SDK toolkit for Voice XML and telephony application developers.