Agilla: a mobile agent middleware for wireless sensor networks. Agilla enables users to inject mobile agents into a wireless sensor network. Agents are autonomous computational entities that can migrate or clone across nodes in a wireless sensor network. Two types of migration and clone instructions are provided: \"strong\" in which both code and state is maintained, and \"weak\" in which only the code is maintained. Agilla facilitates inter-agent coordination via localized tuple spaces, remote tuple space operations, and a neighbor list.