NetBox - NetBox is an open source web application designed to help manage and document computer networks. NetBox was developed specifically to address the needs of network and infrastructure engineers.
Asset Panda - The cloud is playing a very important role for companies who utilize asset management software to track their assets or inventory. See how Asset Panda is leading the field thanks to their cloud-based tracking platform.
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
OpenMAINT - openMAINT manages movable assets, the real estate, and the related maintaining, logistic and economic activities, GIS and BIM
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Reftab - Free asset management software with check in check out. Track assets with custom asset tags and mobile apps. Supports handheld scanners for quick item check out.