Voxeo’s Evolution IVR developer site gives you two options for XML-based, web integrated IVR development.
Evolution Community is a completely free, feature filled service that you can use to design, create, and test IVR applications.
Evolution Professional adds valuable features and telephone technical support for a low bi-yearly fee.
The Evolution IVR developer site provides you with VoiceXML and VOIP via FWD and more !
