RackTables - Racktables is a nifty and robust solution for datacenter and server room asset management.
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.
Racksmith - RackSmith is designed to provide an easy to use web interface to manage equipment and connections...
Gestioip - GestióIP is an automated, Web based IP address management (IPAM) software.
Opendcim - a free, web based Data Center Infrastructure Management application.
phpIPAM - phpipam is an open-source web IP address management application (IPAM).