The WfMC Workflow Management Coalition (http://www.wfmc.org) promotes the advancement of process management technology standards and their use by the industry.
The Java 2 SDK or Java 2 JRE can be downloaded from http://java.sun.com .
The Together Workflow Editor home page is located at http://www.together.at/together/prod/twe/index.html.
JGraph (http://www.jgraph.com) is an open-source swing graph component used in Together Workflow Editor.
Enhydra Shark (http://shark.enhydra.org) - the most flexible Open Source WfMC XPDL workflow engine available