SnowSoftware - Snow Software are suppliers of Software Asset Management products and help optimizing licensing & minimizing compliance risk.
nfsen-ng - nfsen-ng aims to be an in-place replacement for the ageing nfsen.
ManageEngine AssetExplorer - ManageEngine AssetExplorer is a web-based IT Asset Management software that helps you monitor and manage assets in your network.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
IT Asset Management - Best IT Asset Management software & License tool to manage infrastructure efficiently. Cloud asset management application for ticketing to track Assets.
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.