Java

• Willow
• OpenWFE
• jBpm
• OpenebXML
• Werkflow
• OSWorkflow
• WfMOpen
• OFBiz
• Bonita
• Bigbross Bossa
• XFlow
• Taverna
• Enhydra Shark
• PowerFolder
• Open Business Engine
• Freefluo
• JFlower
• JFolder
• JAWE
• Zebra
• ActiveBPEL
• YAWL
• MOBE
• RUNA WFE
• micro-workflow
• bexee
• uEngine
• Flow4J
• Dalma
• IX Workflow
• SWAMP
• JPEd
• JawFlow
• OBPM
• BeanFlow
• Fire Workflow
• WoPeD

C#

• NetBPM

Python

• Bika LIMPS
• Web Workflow
• OpenFlow