PublicVoiceXML is a complete VoiceXML 2.0 browser, designed to work also on low cost telephony hardware using DTMF navigation with hooks to 3rd party TTS and Speech Recognition Modules. Support and sample applications for the mobile world available.
Axiavoice is a phone application server running under Linux. It is designed to run interactive phone applications and be used for their development. These services are available via a normal telephone (using various ISDN interfaces), or a VoIP solution.