Nimuno Loops - LEGO everywhere!
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.
Ralph - Ralph is full-featured Asset Management, DCIM and CMDB system for data center and back office.
DCImanager - DCImanager is a platform for managing physical equipment. Connect any physical equipment to a single platform. Use the platform to manage your servers, switches, PDU as well as physical and virtual networks.
Brickit - Use ML to detect what can be built from your pile of legos
Opendcim - a free, web based Data Center Infrastructure Management application.