CMDB.info, Virtual Guests of open source CMDB components now available for download. Including Nagios, Oreon / Centreon, Nmap2Mysql, OCS Inventory, Open Project, OWL Doc Centre and Change Calendar under the Post Nuke Content Management System.
N(i)², Network Infrastructure Inventory The N(i)² CMDB provides a complete mapping of IT infrastructures — including applications, network and supporting resources — and how they relate to business services
Planet IRM a comprehensive visual CMDB for government and enterprise applications
BPMspace for ITIL an open-source CMDB written in Java with Browser Frontend including ITIL Processes like Incident, Problem, SLM, Configuration and Change Management