The openebXML project also has a couple of different tools available today but needs more development to evolve. openebXML tries to cover the full range of the different main parts of the ebXML specification. There are other open source projects which implement parts of ebXML parts (e.g. there is an project for the ebXML Registry, as well is there a Java API specification for the ebXML Registry).
The current projects at openebXML.org include BML, a binary markup language, a Workbench for edition business definitions, a Business Process Server called Red-Line an ebXML Registry, an ebXML Message Handler and some further tools. Some of the subprojects are still in the inception phase or elaboration phase and need much more development.
The latest tool at openebXML is a CPP (Collaboration Protocol Profile) verification tool, which checks a CPP for validity and references of Business Processes at an ebXML Registry. This tool is not available at the web site yet (December 2001).