Systems and methods for managing software appliances using a broadcast mechanism, embodiments of which incorporate a centralized appliance monitor that collects software appliance state information from a community of clients having software appliance installations. Software appliances can include a reduced-component operating system combined with pre-configured application(s), for instance distributed via optical disc or Web download. When a software appliance instantiates on a client in the network or at other times, the identity and execution state of the application is broadcast to an appliance monitor. The appliance monitor aggregates the appliance state information for all clients in the network, and manages their deployment and execution on the network. The appliance monitor can for example transmit an appliance control instruction to a client to terminate or otherwise manage an uncertified or unapproved appliance, or take other network management action.