Camunda - The Universal Process Orchestrator
Kalam Labs - Twitch for Science
SyncTree - SyncTree is a SaaS-based Super Connecting Platform that connects any services you want
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).
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.
Littlecodr - Insanely fun card game that teaches kids the basics of code