InvGate Insight - Discover and centralize everything you need to know about physical, virtual, and cloud assets in a single platform, laying the groundwork for building a CMDB and a normalized catalogue.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
ManageEngine AssetExplorer - ManageEngine AssetExplorer is a web-based IT Asset Management software that helps you monitor and manage assets in your network.
nfsen-ng - nfsen-ng aims to be an in-place replacement for the ageing nfsen.
Jira Service Desk - IT service desk and customer service software by Jira Service Desk. Powerful ticketing system used by 25,000+ organizations. Try it free today.
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.