Cress is a comprehensive toolset for graphical service/workflow design
Cress (Communication Representation Employing Systematic Specification) allows graphical description of a wide variety of services such as in data communications/telecommunications, but Cress is not limited to this. The approach allows services to be described graphically as (work)flows of activities.
Cress diagrams are automatically translated into formal languages for rigorous analysis and verification, and are also automatically translated into implementation languages for deployment...
Free Open Source VoiceXML editor programmed in Java (Swing). The VoiceXML document is regularly parsed, a tree view is built and syntax errors are reported in a specific table.
CPLed is an OpenSIPS tool for editing CPL scripts in a friendly and easy graphical way. It can be used as a standalone application or embedded in a web page as applet. It also provide CPL script transport functionalities via SIP and HTTP protocols.