What are some alternatives?
When comparing Sunbird dcTrack and RackTables, you can also consider the following products
DCImanager - DCImanager is a highly customizable control panel for Data Center Infrastructure Management.
Opendcim - a free, web based Data Center Infrastructure Management application.
NetBox - None
EasyDCIM - EasyDCIM Is an Control Panel For Automated Data Center Management By ModulesGarden.
Device42 - Automatically maintain an up-to-date inventory of your physical, virtual, and cloud servers and containers, network components, software/services/applications, and their inter-relationships and inter-dependencies.
RackMonkey - RackMonkey is a tool for managing racks of equipment such as servers and switches.