Intalio|BPMS is the world's most widely deployed Business Process Management System (BPMS). Designed around the open source Eclipse BPMN Modeler, Apache ODE BPEL engine, and Tempo WS-Human Task service developed by Intalio, it can support any processes, small or large.
Platform: Linux, Windows, Solaris;License: see for more details(Multiple License due to use of licensed code) https://community.intalio.com/faq/dispQlay-2.html#FAQ36
Reference:https://www.intalio.com/bpms