Camunda - The Universal Process Orchestrator
Kalam Labs - Twitch for Science
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.
RunaWFE - RunaWFE Free is a free Open Source BPMS (business process management system), which serves to optimize and automate business processes (for Windows, Linux, Mac OS).
ProcessMaker - ProcessMaker is an easy to use BPM and workflow software solution. It is used to design, automate, and deploy business processes of any kind.
Littlecodr - Insanely fun card game that teaches kids the basics of code