RackTables - Racktables is a nifty and robust solution for datacenter and server room asset management.
LeoCAD - LeoCAD is a CAD program for creating virtual LEGO models.
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.
LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
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.
Stud.io - Build LEGO designs online with friends.