VoiceXML IVR for Asterisk


I’m searching an existing VoiceXML IVR which can be easily integrated with Asterisk. My requirement is first SIP compatable, then for TDM.

Found Some applications from the forum, VXIasterisk and IBMWebshpere. There are some tools/library to help develop a VoiceXML IVR, such as SIPXVXML and VoXY. Anything else?

Based on your experience, which one is the best in aspect of functionalities, user-friendliness, easy-pickup, etc. Thanks,