Activiti is an open source BPM platform that is lightweight, collaborative, and standards-based using Java. It includes features like mobile clients, integration with frameworks like Spring and services like BPM, ECM, and optional connectivity. The camunda fox BPM platform is based on Activiti and includes additional components for monitoring, modeling, and development support on Java EE containers. Camunda provides training and support for both the open source and commercial editions of Activiti and fox.